Thomson Reuters Corporates Status

Delay in Data for Reports and Analytics service in AMER PROD.

Investigating - Reports and Analytics Service in AMER PROD is currently experiencing delay of around 14 hours. We are working on the data catch up, will notify once complete.
Feb 03, 2026 - 16:28 CST

Reports of errors when trying to open a Tax return

Monitoring - This issue was mitigated at 12:13 PM CST and we will continue to monitor.
Feb 03, 2026 - 12:51 CST

Update - We are seeing some intermittent issues with GoSystem Tax tax return opening feature with our GoSystem Tax RS service. Our team is actively working to resolve this matter as quickly as possible.

Further updates will be provided here as soon as we have more information.
Feb 03, 2026 - 12:13 CST

Update - This issue was mitigated at 11:42 AM CST and we will continue to monitor.
Feb 03, 2026 - 12:04 CST

Investigating - We are currently experiencing intermittent issues with the GoSystem Tax tax return opening feature with our GoSystem Tax RS service. Our team is actively working to resolve this matter as quickly as possible. We apologize for any inconvenience and appreciate your understanding and patience.

Further updates will be provided here as soon as we have more information.
Feb 03, 2026 - 10:46 CST

WorkFlow Tools Operational

AMERS Calendar Operational

AMERS Calendar Classic Operational

AMERS FileRoom Operational

AMERS WorkFlow Operational

AMERS WorkFlow Manager Classic Operational

APAC Calendar Operational

APAC Calendar Classic Operational

APAC FileRoom Operational

APAC WorkFlow Operational

APAC WorkFlow Manager Classic Operational

EMEA Calendar Operational

EMEA Calendar Classic Operational

EMEA FileRoom Operational

EMEA WorkFlow Operational

EMEA WorkFlow Manager Classic Operational

Platform Operational

AMERS (onesourcetax.com) Operational

AMERS (onesourcelogin.com) Operational

AMERS Administration Operational

AMERS API Administration Operational

AMERS UAT (uat.onesourcetax.com) Operational

AMERS UAT (uat.onesourcelogin.com) Operational

APAC (apac1.onesourcetax.com) Operational

APAC (onesourcelogin.com.au) Operational

APAC Administration Operational

APAC API Administration Operational

EMEA (emea1.onesourcetax.com) Operational

EMEA (onesourcelogin.eu) Operational

EMEA Administration Operational

EMEA API Administration Operational

UAT API Administration Operational

Data Tools Operational

AMERS Audit Manager Operational

AMERS DataFlow Operational

AMERS Data Hub Operational

AMERS General Ledger Manager Operational

AMERS R&D Tax Credit Manager Operational

AMERS SAP Trial Balance Integration Operational

AMERS Workpapers Operational

APAC Audit Manager Operational

APAC DataFlow Operational

APAC Data Hub Operational

APAC General Ledger Manager Operational

APAC R&D Tax Credit Manager Operational

APAC SAP Trial Balance Integration Operational

APAC Workpapers Operational

EMEA Audit Manager Operational

EMEA DataFlow Operational

EMEA Data Hub Operational

EMEA General Ledger Manager Operational

EMEA SAP Trial Balance Integration Operational

EMEA R&D Tax Credit Manager Operational

EMEA Workpapers Operational

Direct Tax Operational

AMERS (web) BEPS Action Manager Operational

AMERS DAC6 Reporter Operational

AMERS Data Query Operational

AMERS GoSystem Tax RS Operational

AMERS GoSystem Tax RS API Operational

AMERS Income Tax Operational

AMERS Income Tax API Operational

AMERS State Apportionment Operational

AMERS (legacy) Statutory Reporting Operational

AMERS (web) Statutory Reporting Operational

AMERS (New) Tax Provision Operational

AMERS Tax Provision Operational

AMERS Uncertain Tax Positions Operational

APAC (legacy) Corporate Tax Operational

APAC (web) Corporate Tax Operational

APAC (web) E-filing Manager (Corporate Tax) Operational

APAC (web) Fringe Benefits Tax Operational

APAC (legacy) Statutory Reporting Operational

APAC (web) Statutory Reporting Operational

APAC Tax Provision Operational

APAC Trusts (AU) Operational

APAC Uncertain Tax Positions Operational

EMEA (web) BEPS Action Manager Operational

EMEA (legacy) Corporate Tax Operational

EMEA (web) Corporate Tax Operational

EMEA (web) E-filing Manager (Corporate Tax) Operational

EMEA DAC6 Reporter Operational

EMEA (legacy) Statutory Reporting Operational

EMEA (web) Statutory Reporting Operational

EMEA Tax Provision Operational

EMEA Uncertain Tax Positions Operational

Global Trade Operational

Global Trade Content Operational

Global Trade - LATAM Operational

Global Trade - pwd by Integration Point Operational

Govt Connectivity BE - PLDA Operational

Govt Connectivity DE - ATLAS Operational

Govt Connectivity FR - DELTA Operational

Govt Connectivity MX - SAAI/COVE Operational

Govt Connectivity NL - AGS Operational

Govt Connectivity UK - CHIEF/CDS Operational

Govt Connectivity US - ABI/AES Operational

GTM Platform Operational

Implementation Environment Operational

ONESOURCE Classifier Operational

Transports AS2 Operational

Transports Client Interchange Web Service Operational

Transports FTP Operational

Indirect Tax Degraded Performance

ONESOURCE Determination Enterprise Cloud (AWS AMER) Operational

ONESOURCE Determination Enterprise Cloud (AWS EMEA) Operational

ONESOURCE Determination Enterprise Cloud (OCI AMER) Operational

ONESOURCE Determination Anywhere (AWS AMER) Operational

ONESOURCE Determination Anywhere (OCI AMER) Operational

Configuration API (AWS AMER) Operational

Configuration API (AWS EMEA) Operational

Configuration API (OCI AMER) Operational

ONESOURCE Determination Original Cloud (AMER) Operational

ONESOURCE Determination Original Dedicated Cloud (AMER) Operational

ONESOURCE Determination Original Dedicated Cloud (EMEA) Operational

Certificate Manager Original Cloud Operational

Certificate Manager Enterprise Cloud Operational

Reports and Analytics Enterprise Cloud Degraded Performance

Reporting - Original Cloud Operational

US Tax Content Operational

Canada Tax Content Operational

International Tax Content Operational

Content Extract Operational

Fast Sales Tax Operational

ONESOURCE Property Tax Operational

ONESOURCE Sales and Use Tax Compliance (AMER) Operational

ONESOURCE Indirect Compliance (APAC) Operational

APAC (web) E-filing Manager (Indirect Compliance) Operational

ONESOURCE Indirect Compliance (EMEA) Operational

EMEA (web) E-filing Manager (Indirect Compliance) Operational

ONESOURCE Indirect Compliance (UAT) Operational

ONESOURCE E-Invoicing (PROD) Operational

ONESOURCE E-Invoicing (UAT) Operational

ONESOURCE Determination - On Premise Operational

ONESOURCE Determination (APAC) Operational

IDT Integrations Operational

Address Validation Service Operational

BigCommerce Operational

Coupa Operational

Data File Integrator - Enterprise Cloud Operational

Data File Integrator - Original Cloud Operational

Microsoft Dynamics 365 - Commerce Cloud Operational

Microsoft Dynamics 365FOE Operational

Microsoft Dynamics AX 2012 Operational

Microsoft Dynamics GP Operational

NetSuite Legacy/Direct Operational

NetSuite SuiteTax Operational

Oracle EBS R12 Operational

Oracle Fusion Tax Cloud - 1.x Operational

Oracle Fusion Tax Cloud - 2.x Operational

Salesforce Subscription Management Operational

SAP 5.2B Basic (RFC) Operational

SAP Ariba - Cloud Operational

SAP Ariba - OnPremise Operational

SAP Ariba - Original cloud Operational

SAP Business One Operational

SAP C4/HANA Commerce Cloud Operational

SAP Global Next Operational

SAP Global Tax Service Operational

SAP US Tax S4/HANA Cloud Operational

Trust & Info Rptg Operational

AMERS NRA - FNIS & Users Website Operational

AMERS Tax Information Reporting Operational

AMERS Trust Tax Operational

AMERS Trust Tax Insight Operational

Risk Solutions Operational

AMERS Compliance Learning Operational

AMERS Oden Online (State Rules and Regulations) Operational

AMERS Oden Policy Terminator Operational

AMERS Oden Track (web) Operational

AMERS Regulatory Intelligence Operational

ANZ Compliance Learning Operational

APAC Compliance Learning Operational

APAC Regulatory Intelligence Operational

EMEA Compliance Learning Operational

EMEA Regulatory Intelligence Operational

Tax Brazil Operational

Checkpoint Corporate Operational

ONESOURCE DFe Operational

ONESOURCE Tax Analyser Operational

Tax One for SAP® solutions Operational

Tax Brazil - Tax One Operational

Tax One - Application [AMERS] Operational

Tax One - Application [UAT AMERS] Operational

Sending and Receiving Files [AMERS] Operational

Sending and Receiving Files [UAT AMERS] Operational

File/Email Processing [AMERS] Operational

File/Email Processing [UAT AMERS] Operational

ECF/REINF (messaging/integration) [AMERS] Operational

ECF/REINF (messaging/integration) [UAT AMERS] Operational

Tax Automation [AMERS] Operational

Tax Automation [UAT AMERS] Operational

OBI [AMERS] Operational

OBI [UAT AMERS] Operational

Tax One - Application [EMEA] Operational

Tax One - Application [UAT EMEA] Operational

Sending and Receiving Files [EMEA] Operational

Sending and Receiving Files [UAT EMEA] Operational

File/Email Processing [EMEA] Operational

File/Email Processing [UAT EMEA] Operational

ECF/REINF (messaging/integration) [EMEA] Operational

ECF/REINF (messaging/integration) [UAT EMEA] Operational

Tax Automation [EMEA] Operational

Tax Automation [UAT EMEA] Operational

OBI [EMEA] Operational

OBI [UAT EMEA] Operational

Customer Support Operational

Case Management Dashboard Operational

Platform Operational

Workflow Tools Operational

Data Tools Operational

Direct Tax Operational

Global Trade Operational

Indirect Tax Operational

Trust & Info Rptg Operational

Legal Solutions Operational

Risk Solutions Operational

Tax Brazil Operational

Operational

Degraded Performance

Partial Outage

Major Outage

Maintenance

Scheduled Maintenance

ONESOURCE Oracle Fusion Rate to Regime Content release for BRAZIL JANUARY 2026 Jan `22`, `2026` `12:30` - Jan `23`, `2026` `12:30` CST

ONESOURCE Oracle Fusion Rate to Regime Content release Content for BRAZIL region for JANUARY 2026 has been released. It is available in both Integration UI and customer portal for download.
Posted on Jan 22, 2026 - 05:01 CST

UAT - ONESOURCE Platform Security Maintenance Application server patching in February 2026. Feb `4`, `2026` `00:00`-`04:00` CST

ONESOURCE Platform will be undergoing maintenance in UAT on Wednesday, Feb 04, 00:00 AM - 4:00 AM CST.

Users may experience degraded performance from 00:00 AM CST to 00:30 AM CST and 02:00 AM to 02:30 AM CST only.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:42 CST

ONESOURCE Determination Enterprise Cloud– Version 2026.01 Release Information (PROD AMER environment) Feb `4`, `2026` `03:00`-`09:00` CST

ONESOURCE Determination Enterprise Cloud– Version 2026.01 is being deployed in the PROD AMER environment on February 04, 2026. Your access to the tax calculation services and the application will not be interrupted.
Posted on Jan 05, 2026 - 09:45 CST

ONESOURCE Determination Anywhere – Version 2026.01 Release Information (PROD environment) Feb `4`, `2026` `05:00`-`11:00` CST

ONESOURCE Determination Anywhere – Version 2026.01 is being deployed in the PROD environment on February 04, 2026. Your access to the tax calculation services and the application will not be interrupted.
Posted on Jan 05, 2026 - 09:53 CST

ONESOURCE API Administration Backend Services and UI February 2026 release in UAT. Feb `4`, `2026` `22:00` - Feb `5`, `2026` `03:00` CST

ONESOURCE API Administration will undergo scheduled maintenance to enhance system performance, reliability, and UI features. Some services may be temporarily affected; please try again later if you encounter issues. We apologize for any inconvenience and appreciate your patience. For urgent assistance during this period, contact our support team. Thank you for your cooperation. For more on API Administration, see the Guide.
Posted on Jan 28, 2026 - 18:27 CST

OSPI Platform – AMER Major release for January 2026 Feb `5`, `2026` `00:00`-`06:00` CST

ONESOURCE Platform will be performing scheduled maintenance on our systems to ensure optimal performance and reliability. During this maintenance window, certain services may experience some issues. In such cases, we recommend trying after some time. We apologize for any inconvenience this may cause and appreciate your patience and understanding. If you have any urgent inquiries or require assistance during the maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 30, 2026 - 14:02 CST

ONESOURCE API Administration Backend Services February 2026 release in all Production regions Feb `5`, `2026` `01:00`-`06:00` CST

ONESOURCE API Administration will be performing scheduled maintenance on our systems to ensure optimal performance and reliability. During this maintenance window, certain services may experience some issues. In such cases, we recommend trying after some time. We apologize for any inconvenience this may cause and appreciate your patience and understanding. If you have any urgent inquiries or require assistance during the maintenance period, please contact our support team. Thank you for your cooperation.

To explore the capabilities of API Administration, please refer to the Guide.
Posted on Jan 28, 2026 - 18:29 CST

ONESOURCE API Administration February 2026 release – APAC Feb `5`, `2026` `07:00`-`12:00` CST

APAC - ONESOURCE Platform Security Maintenance Application server patching for February 2026 . Feb `5`, `2026` `07:00`-`11:00` CST

ONESOURCE Platform will be undergoing maintenance in APAC on Thursday, Feb 05, 07:00 AM - 11:00 AM CST.

Users may experience degraded performance from 07:00 AM CST to 07:30 AM CST and 9:00 AM to 09:30 AM CST only.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:43 CST

ONESOURCE Indirect Compliance Maintenance Event (R2026.02) planned on Thursday 05th February 2026 Feb `5`, `2026` `07:00`-`11:00` CST

Database maintenance event in progress to deploy R2026.02

There will be limited service during this deployment.
Posted on Jan 29, 2026 - 10:40 CST

ONESOURCE API Administration February 2026 release – EMEA Feb `5`, `2026` `16:00`-`21:00` CST

EMEA - ONESOURCE Platform Security Maintenance Application server patching February 2026. Feb `5`, `2026` `18:00`-`22:00` CST

ONESOURCE Platform will be undergoing maintenance in EMEA on Thursday, Feb 05, 06:00 PM - 10:00 PM CST

Users may experience degraded performance from 6:00 PM CST to 6:30 PM CST and 8:00 PM CST to 8:30 PM CST only.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:43 CST

ONESOURCE Indirect Compliance Maintenance Event (R2026.02) planned on Thursday 05th February 2026 Feb `5`, `2026` `18:30`-`22:30` CST

Database maintenance event in progress to deploy R2026.02

There will be limited service during this deployment.
Posted on Jan 29, 2026 - 10:42 CST

ONESOURCE Income Tax Feb `6`, `2026` `00:00`-`01:30` CST

ONESOURCE Income Tax will be undergoing maintenance on Friday, Feb 6th between 12:00am – 1:30am CT
Posted on Jan 29, 2026 - 13:36 CST

ONESOURCE API Administration February 2026 release – AMER Feb `6`, `2026` `00:00`-`05:00` CST

APAC - ONESOURCE Platform Security Maintenance Application server patching for February 2026 Feb `6`, `2026` `07:00`-`11:00` CST

ONESOURCE Platform will be undergoing maintenance in APAC on Friday, Feb 06, 07:00 AM - 11:00 AM CST.
Users may experience degraded performance from 07:00 AM CST to 07:30 AM CST and 09:00 AM to 09:30 AM CST only.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Feb 03, 2026 - 15:27 CST

UAT - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `00:30`-`07:30` CST

ONESOURCE Platform will be undergoing maintenance in UAT on Saturday Feb 07, 00:30 AM - 07:30 AM CST.

ONESOURCE Platform will be unavailable from Saturday Feb 07, 4:00 AM CST to 4:15 AM CST.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:45 CST

APAC - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `06:00`-`14:00` CST

ONESOURCE Platform will be undergoing maintenance in APAC on Saturday Feb 07, 06:00 AM - 02:00 PM CST.

ONESOURCE Platform will be unavailable from Saturday Feb 07, 10:00 AM CST to 10:15 AM CST.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:46 CST

EMEA - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `18:00` - Feb `8`, `2026` `02:00` CST

ONESOURCE Platform will be undergoing maintenance in EMEA on Saturday Feb 07, 06:00 PM – Sunday Feb 08, 02:00 AM CST.

ONESOURCE Platform will be unavailable from Saturday Feb 07, 10:00 PM CST to 10:15 PM CST.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:46 CST

AMER - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `23:30` - Feb `8`, `2026` `07:30` CST

ONESOURCE Platform will be undergoing maintenance in AMER on Saturday Feb 07, 11:30 PM – Sunday Feb 08, 07:30 AM CST.
ONESOURCE Platform will be unavailable from Sunday Feb 08, 4:00 AM CST to 4:20 AM CST.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:47 CST

ONESOURCE GTM – AWS Maintenance Feb `8`, `2026` `00:00`-`17:00` CST

Thomson Reuters will be performing scheduled maintenance on Sunday, February 8th, 2026 beginning at 1 AM Eastern time and will conclude by Sunday, February 8th, 2026 at 6 PM Eastern time.

The maintenance will include updates and patches to implementation and production environments. During this maintenance there will be intermittent downtime, and you will not be able to access implementation and production instances.

If you have any questions or concerns, please contact Customer Support.
Posted on Jan 20, 2026 - 13:11 CST

GoSystem Tax RS Maintenance Feb `8`, `2026` `00:00`-`03:00` CST

GoSystem Tax RS will be undergoing maintenance on Sunday, February 8th between 12:00am – 3:00am CT, users may see a brief degradation in the application while we are performing the maintenance.
Posted on Jan 30, 2026 - 14:24 CST

ONESOURCE Income Tax Maintenance Feb `8`, `2026` `00:00`-`03:00` CST

ONESOURCE Income Tax will be undergoing maintenance on Sunday, February 8th between 12:00am – 3:00am CT, users may see a brief degradation in the application while we are performing the maintenance.
Posted on Jan 30, 2026 - 14:25 CST

AMER - ONESOURCE Platform Security Maintenance Application server patching for February 2026. Feb `9`, `2026` `00:00`-`04:00` CST

ONESOURCE Platform will be undergoing maintenance in AMER on Monday, Feb 09, 00:00 AM - 4:00 AM CST.

Users may experience degraded performance from 00:00 AM CST to 00:30 AM CST and 02:00 AM CST to 02:30 AM CST only.

In case of any issues, we recommend the users to please retry.

We appreciate your patience and understanding. If you have any urgent inquiries or require assistance during this maintenance period, please contact our support team. Thank you for your cooperation.
Posted on Jan 14, 2026 - 04:44 CST

ONESOURCE Determination – Configuration API Version 2026.1 Production Release Information (EMEA Region) Feb `9`, `2026` `03:00`-`09:00` CST

ONESOURCE Determination – Configuration API Version 2026.1 is being deployed in the EMEA Production environment. No downtime is expected during this deployment window.
Posted on Jan 30, 2026 - 14:19 CST

ONESOURCE Determination – Configuration API Version 2026.1 Production Release Information (AMER Region) Feb `10`, `2026` `03:00`-`10:00` CST

ONESOURCE Determination – Configuration API Version 2026.1 is being deployed in the AMER Production environment. No downtime is expected during this deployment window.
Posted on Jan 30, 2026 - 14:19 CST

ONESOURCE Tax Information Release OTIR Release 25.07 17th February 2026 (AMERS) Feb `17`, `2026` `19:00` - Feb `18`, `2026` `06:00` CST

ONESOURCE Tax Information Reporting Release 25.07 will be installed from 7:00 P.M. (CT) on 17th February 2026 until 06:00 A.M. (CT) on 18th February 2026. System availability and API's may be affected during release time.
Posted on Jan 21, 2025 - 04:31 CST

ONESOURCE Income Tax Feb `20`, `2026` `00:00`-`01:30` CST

ONESOURCE Income Tax will be undergoing maintenance on Friday, Feb 20th between 12:00am – 1:30am CT
Posted on Jan 29, 2026 - 13:36 CST

ONESOURCE GTM – AWS Maintenance Feb `22`, `2026` `00:00`-`17:00` CST

Thomson Reuters will be performing scheduled maintenance on Sunday, February 22nd, 2026 beginning at 1 AM Eastern time and will conclude by Sunday, February 22nd, 2026 at 6 PM Eastern time.

The maintenance will include updates and patches to implementation and production environments. During this maintenance there will be intermittent downtime, and you will not be able to access implementation and production instances.

If you have any questions or concerns, please contact Customer Support.
Posted on Jan 20, 2026 - 13:11 CST

ONESOURCE Global Trade - AS2 Certificate Update Feb `22`, `2026` `09:00`-`11:00` CST

Thomson Reuters will be updating the AS2 Certificate for ONESOURCE Global Trade Management on February 22, 2026, at 10:00 am Eastern. If you use AS2 with ONESOURCE GTM and have not received an email with the certificate, please reach out to IntegrationPoint@ThomsonReuters.com with the subject line "AS2 Certificate Update" to receive the certificate.

Please note the current certificate will expire on Saturday, February 28, 2026 at 11:59 PM.
Posted on Feb 02, 2026 - 09:16 CST

ONESOURCE GTM – AWS Maintenance Mar `8`, `2026` `00:00`-`18:00` CDT

Thomson Reuters will be performing scheduled maintenance on Sunday, March 8th, 2026 beginning at 1 AM Eastern time and will conclude by Sunday, March 8th, 2026 at 6 PM Eastern time.

The maintenance will include updates and patches to implementation and production environments. During this maintenance there will be intermittent downtime, and you will not be able to access implementation and production instances.

If you have any questions or concerns, please contact Customer Support.
Posted on Jan 20, 2026 - 13:11 CST

ONESOURCE Tax Information Reporting System Maintenance 21st March 2026 (AMERS) Mar `21`, `2026` `22:00` - Mar `22`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 21st March 2026 until 07:00 A.M. (CT) on 22nd March 2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:21 CST

ONESOURCE GTM – AWS Maintenance Mar `22`, `2026` `00:00`-`17:00` CDT

Thomson Reuters will be performing scheduled maintenance on Sunday, March 22nd, 2026 beginning at 1 AM Eastern time and will conclude by Sunday, March 22nd, 2026 at 6 PM Eastern time.

The maintenance will include updates and patches to implementation and production environments. During this maintenance there will be intermittent downtime, and you will not be able to access implementation and production instances.

If you have any questions or concerns, please contact Customer Support.
Posted on Jan 20, 2026 - 13:11 CST

ONESOURCE Tax Information Release OTIR Release 26.01 21st April 2026 (AMERS) Apr `21`, `2026` `19:00` - Apr `22`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting Release 26.01 will be installed from 7:00 P.M. (CT) on 21st April 2026 until 06:00 A.M. (CT) on 22nd April 2026. System availability and API's may be affected during release time.
Posted on Nov 20, 2025 - 05:23 CST

ONESOURCE Tax Information Reporting System Maintenance 25th April 2026 (AMERS) Apr `25`, `2026` `22:00` - Apr `26`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 25th April until 07:00 A.M. (CT) on 26th April for scheduled maintenance.
Posted on Nov 20, 2025 - 05:24 CST

ONESOURCE Tax Information Reporting System Maintenance 23rd May 2026 (AMERS) May `23`, `2026` `22:00` - May `24`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 23rd May  2026 until 07:00 A.M. (CT) on 24th May 2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:25 CST

ONESOURCE Tax Information Release OTIR Release 26.02 16th June 2026 (AMERS) Jun `16`, `2026` `19:00` - Jun `17`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting Release 26.02 will be installed from 7:00 P.M. (CT) on 16th June 2026 until 06:00 A.M. (CT) on 17th June 2026. System availability and API's may be affected during release time.
Posted on Nov 20, 2025 - 05:26 CST

ONESOURCE Tax Information Reporting System Maintenance 27th June 2026 (AMERS) Jun `27`, `2026` `22:00` - Jun `28`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 27th June 2026 until 07:00 A.M. (CT) on 28th June  2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:46 CST

ONESOURCE Tax Information Reporting System Maintenance 25th July 2026 (AMERS) Jul `25`, `2026` `22:00` - Jul `26`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 25th July 2026 until 07:00 A.M. (CT) on 26th July 2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:32 CST

ONESOURCE Tax Information Release OTIR Release 26.03 11th August 2026 (AMERS) Aug `11`, `2026` `19:00` - Aug `12`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting Release 26.03 will be installed from 7:00 P.M. (CT) on 11th August 2026 until 06:00 A.M. (CT) on 12th August 2026. System availability and API's may be affected during release time.
Posted on Nov 20, 2025 - 05:33 CST

ONESOURCE Tax Information Reporting System Maintenance 22nd August 2026 (AMERS) Aug `22`, `2026` `22:00` - Aug `23`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 22nd August 2026 until 07:00 A.M. (CT) on 23rd August 2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:34 CST

ONESOURCE Tax Information Release OTIR Release 26.04 20th October 2026 (AMERS) Oct `20`, `2026` `19:00` - Oct `21`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting Release 26.04 will be installed from 7:00 P.M. (CT) on  20th October 2026 until 06:00 A.M. (CT) on 21st October 2026. System availability and API's may be affected during release time.
Posted on Nov 20, 2025 - 05:35 CST

ONESOURCE Tax Information Reporting System Maintenance 24th October 2026 (AMERS) Oct `24`, `2026` `22:00` - Oct `25`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 24th October 2026 until 07:00 A.M. (CT) on 25th October 2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:36 CST

ONESOURCE Tax Information Reporting System Maintenance 21st November 2026 (AMERS) Nov `21`, `2026` `22:00` - Nov `22`, `2026` `07:00` CST

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 21st November  2026 until 07:00 A.M. (CT) on 22nd November 2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:37 CST

ONESOURCE Tax Information Release OTIR Release 26.05 1st December 2026 (AMERS) Dec `1`, `2026` `19:00` - Dec `2`, `2026` `06:00` CST

ONESOURCE Tax Information Reporting Release 26.05 will be installed from 7:00 P.M. (CT) on 1st December 2026 until 06:00 A.M. (CT) on 2nd December 2026. System availability and API's may be affected during release time.
Posted on Nov 20, 2025 - 05:38 CST

ONESOURCE Tax Information Release OTIR Release 26.06 22nd December 2026 (AMERS) Dec `22`, `2026` `19:00` - Dec `23`, `2026` `06:00` CST

ONESOURCE Tax Information Reporting Release 26.06 will be installed from 7:00 P.M. (CT) on 22nd December 2026 until 06:00 A.M. (CT) on 23rd December 2026. System availability and API's may be affected during release time.
Posted on Nov 20, 2025 - 05:38 CST

ONESOURCE Tax Information Reporting System Maintenance 26th December 2026 (AMERS) Dec `26`, `2026` `22:00` - Dec `27`, `2026` `07:00` CST

ONESOURCE Tax Information Reporting and API's will be unavailable from 10:00 P.M. (CT) on 26th December 2026 until 07:00 A.M. (CT) on 27th December 2026 for scheduled maintenance.
Posted on Nov 20, 2025 - 05:39 CST

ONESOURCE Tax Information Release OTIR Release 26.07 16th February 2027 (AMERS) Feb `16`, `2027` `19:00` - Feb `17`, `2027` `06:00` CST

ONESOURCE Tax Information Reporting Release 26.07 will be installed from 7:00 P.M. (CT) on 16th February 2027 until 06:00 A.M. (CT) on 17th February 2027. System availability and API's may be affected during release time.
Posted on Nov 20, 2025 - 05:48 CST

Past Incidents

Feb 3, 2026

OSPI Platform – EMEA Major release for January 2026

Completed - The scheduled maintenance has been completed.
Feb 3, 17:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 3, 11:00 CST

Scheduled - ONESOURCE Platform will be performing scheduled maintenance on our systems to ensure optimal performance and reliability. During this maintenance window, certain services may experience some issues. In such cases, we recommend trying after some time. We apologize for any inconvenience this may cause and appreciate your patience and understanding. If you have any urgent inquiries or require assistance during the maintenance period, please contact our support team. Thank you for your cooperation.
Jan 30, 14:02 CST

ONESOURCE Oracle Fusion Rate to Regime Content release for INDIA FEBRUARY 2026

Completed - The scheduled maintenance has been completed.
Feb 3, 12:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 2, 12:30 CST

Scheduled - ONESOURCE Oracle Fusion Rate to Regime Content release Content for INDIA region for FEBRUARY 2026 has been released. It is available in both Integration UI and customer portal for download.
Feb 2, 10:15 CST

DataFlow NextGen Intermittent Availability

Resolved - This incident has been resolved.
Feb 3, 10:47 CST

Investigating - We are currently experiencing a performance issue with the DataFlow NextGen grid feature with our DataFlow NextGen service. Our team is actively working to resolve this matter as quickly as possible. We apologize for any inconvenience and appreciate your understanding and patience.

Further updates will be provided here as soon as we have more information, if you have any questions please contact Customer Support.
Feb 3, 10:09 CST

ONESOURCE Determination – Configuration API Version 2026.1 Release Information (AMER Region)

Completed - The scheduled maintenance has been completed.
Feb 3, 10:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 3, 03:00 CST

Scheduled - ONESOURCE Determination – Configuration API Version 2026.1 is being deployed in the AMER UAT environment. No downtime is expected during this deployment window.
Jan 30, 14:19 CST

Feb 2, 2026

ONESOURCE Determination Enterprise Cloud - Backend Maintenance in PROD Environment (EMEA-AWS)

Completed - The scheduled maintenance has been completed.
Feb 2, 11:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 2, 09:00 CST

Scheduled - ONESOURCE Determination Enterprise Cloud (EMEA-AWS) - We are performing a planned maintenance activity in the PROD environment on February 02, 2026, between 10:00 AM - 12:00 PM ET. This approach is planned to ensure overall platform stability and the safe enablement of the new capabilities. You may encounter occasional errors with the REST APIs during this activity, which may result in temporary issues with tax calculations. If this happens, simply try your request again.
Jan 30, 10:18 CST

ONESOURCE Determination – Configuration API Version 2026.1 Release Information (EMEA Region)

Completed - The scheduled maintenance has been completed.
Feb 2, 10:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 2, 03:00 CST

Scheduled - ONESOURCE Determination – Configuration API Version 2026.1 is being deployed in the EMEA UAT environment. No downtime is expected during this deployment window.
Jan 30, 14:19 CST

OSPI Platform – APAC Emergency maintenance for February 2026

Completed - The scheduled maintenance has been completed.
Feb 2, 10:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 2, 06:00 CST

Scheduled - ONESOURCE Platform will be performing emergency maintenance on our systems to ensure optimal performance and reliability. During this maintenance window, certain services may experience some issues. In such cases, we recommend trying after some time. We apologize for any inconvenience this may cause and appreciate your patience and understanding. If you have any urgent inquiries or require assistance during the maintenance period, please contact our support team. Thank you for your cooperation.
Jan 30, 14:02 CST

OSPI Platform – UAT Emergency maintenance for February 2026

Completed - The scheduled maintenance has been completed.
Feb 2, 06:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 2, 00:00 CST

ONESOURCE Statutory Reporting - Web [AMERS]

Completed - The scheduled maintenance has been completed.
Feb 2, 00:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 1, 22:45 CST

Scheduled - ONESOURCE Statutory Reporting - Web [AMERS] will be undergoing scheduled maintenance during Feb 01, 2026 19:30 EST to Feb 02, 2026 01:30 EST.
Feb 1, 22:41 CST

Feb 1, 2026

ONESOURCE Statutory Reporting - Web [AMERS]

Completed - The scheduled maintenance has been completed.
Feb 1, 22:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 1, 18:30 CST

Scheduled - ONESOURCE Statutory Reporting - Web [AMERS] will be undergoing scheduled maintenance during Feb 01, 2026 19:30 EST to Feb 01, 2026 23:30 EST.
Jan 29, 09:17 CST

Jan 31, 2026

ONESOURCE Oracle Fusion Rate to Regime Content release for CANADA FEBRUARY 2026

Completed - The scheduled maintenance has been completed.
Jan 31, 12:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 30, 12:30 CST

Scheduled - ONESOURCE Oracle Fusion Rate to Regime Content release Content for CANADA region for FEBRUARY 2026 has been released. It is available in both Integration UI and customer portal for download.
Jan 30, 04:10 CST

Jan 30, 2026

ONESOURCE Data Hub and ONESOURCE General Ledger Manager Products downtime

Completed - The scheduled maintenance has been completed.
Jan 30, 21:20 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 30, 21:00 CST

Scheduled - ONESOURCE Data Hub and ONESOURCE General Ledger Manager infrastructure will undergo a technical upgrade to maintain the system performance and reliability. Some services may be temporarily affected during this activity, which is carried out from Thursday, January 30, 2026, 9:00PM to 9:20PM CDT. We apologize for any inconvenience and appreciate your patience. For any queries, please contact our support team. Thank you for your cooperation.
Jan 30, 05:05 CST

ONESOURCE Statutory Reporting - Web [APAC]

Completed - The scheduled maintenance has been completed.
Jan 30, 08:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 30, 04:00 CST

Scheduled - ONESOURCE Statutory Reporting - Web [APAC] will be undergoing scheduled maintenance during Jan 30, 2026 21:00 AEDT to Jan 31, 2026 01:00 AEDT.
Jan 29, 09:16 CST

ONESOURCE Data Hub and ONESOURCE General Ledger Manager Products downtime

Completed - The scheduled maintenance has been completed.
Jan 30, 06:20 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 30, 06:00 CST

Scheduled - ONESOURCE Data Hub and ONESOURCE General Ledger Manager infrastructure will undergo a technical upgrade to maintain the system performance and reliability. Some services may be temporarily affected during this activity, which is carried out from Friday, January 30, 2026, 06:00AM to 06:20AM CDT. We apologize for any inconvenience and appreciate your patience. For any queries, please contact our support team. Thank you for your cooperation.
Jan 30, 04:52 CST

ONESOURCE Data Hub and ONESOURCE General Ledger Manager Products downtime

Completed - The scheduled maintenance has been completed.
Jan 30, 05:20 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 30, 05:00 CST

Scheduled - ONESOURCE Data Hub and ONESOURCE General Ledger Manager infrastructure will undergo a technical upgrade to maintain the system performance and reliability. Some services may be temporarily affected during this activity, which is carried out from Friday, January 30, 2026, 5:00AM to 5:20AM CDT. We apologize for any inconvenience and appreciate your patience. For any queries, please contact our support team. Thank you for your cooperation.
Jan 30, 04:45 CST

ONESOURCE Tax Provision [AMERS}

Completed - The scheduled maintenance has been completed.
Jan 30, 01:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 29, 22:00 CST

Scheduled - ONESOURCE Tax Provision will be undergoing maintenance activities on January 29-30, 2026.
Jan 29, 09:04 CST

Jan 29, 2026

ONESOURCE Statutory Reporting - Web [EMEA]

Completed - The scheduled maintenance has been completed.
Jan 29, 22:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 29, 18:30 CST

Scheduled - ONESOURCE Statutory Reporting - Web [EMEA] will be undergoing scheduled maintenance during Jan 30, 2026 00:30 GMT to Jan 30, 2026 04:30 GMT.
Jan 29, 09:16 CST

OSPI Platform – APAC Emergency maintenance for January 2026

Completed - The scheduled maintenance has been completed.
Jan 29, 16:01 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 29, 10:00 CST

ONESOURCE Tax Provision [EMEA]

Completed - The scheduled maintenance has been completed.
Jan 29, 16:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 29, 15:00 CST

Scheduled - ONESOURCE Tax Provision will be undergoing maintenance activities on January 29 2026.
Jan 29, 09:04 CST

Delay in Data for reports and analytics service in AMER PROD

Resolved - This incident has been resolved.
Jan 29, 13:38 CST

Investigating - Reports and Analytics Service data in AMER PROD, experiencing delay of around 6 hours.
Jan 29, 08:03 CST

We are investigating reports that some customers cannot open GST returns.

Resolved - This incident has been resolved.
Jan 29, 10:33 CST

Monitoring - We are currently experiencing intermittent issues with the GoSystem Tax RS Browser. Our team is actively working to resolve this matter as quickly as possible. We apologize for any inconvenience and appreciate your understanding and patience.

Further updates will be provided here as soon as we have more information. If you have any questions, please contact Customer Support.
Jan 28, 16:12 CST

ONESOURCE Global Trade - DIS Transmission Errors

Resolved - This incident has been resolved.
Jan 29, 08:58 CST

Monitoring - A fix has been put into place, and we are monitoring the results.
Jan 28, 12:38 CST

Identified - Thomson Reuters has identified an issue affecting DIS transmissions. While we work to resolve it, customers may experience errors when submitting DIS requests. We'll provide an update as soon as more information is available.
Jan 28, 11:59 CST

Delay in Data for reports and analytics service in AMER PROD

Resolved - This incident has been resolved.
Jan 29, 04:01 CST

Update - The Reports and Analytics Service in AMER PROD is currently experiencing a delay of 5 hours. Our team is actively working on data catch‑up to restore the service to normal processing levels. We will provide an update and notify once the catch‑up process is complete
Jan 29, 01:57 CST

Update - The Reports and Analytics Service in AMER PROD is currently experiencing a delay of 7 hours. Our team is actively working on data catch‑up to restore the service to normal processing levels. We will provide an update and notify once the catch‑up process is complete.
Jan 29, 00:35 CST

Investigating - The Reports and Analytics Service in AMER PROD is currently experiencing a delay of 6 hours. Our team is actively working on data catch‑up to restore the service to normal processing levels. We will provide an update and notify once the catch‑up process is complete.
Jan 28, 19:15 CST

Jan 28, 2026

ONESOURCE Determination Enterprise Cloud– Version 2026.01 Release Information (PROD EMEA environment)

Completed - The scheduled maintenance has been completed.
Jan 28, 07:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 28, 03:00 CST

Scheduled - ONESOURCE Determination Enterprise Cloud– Version 2026.01 is being deployed in the PROD EMEA environment on January 28, 2026. Your access to the tax calculation services and the application will not be interrupted.
Jan 5, 09:43 CST

OSPI Platform – UAT Emergency maintenance for Jan 2026

Completed - The scheduled maintenance has been completed.
Jan 28, 06:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 28, 00:00 CST

Scheduled - ONESOURCE Platform will be performing emergency maintenance in UAT on our systems to ensure optimal performance and reliability. During this maintenance window, certain services may experience some issues. In such cases, we recommend trying after some time. We apologize for any inconvenience this may cause and appreciate your patience and understanding. If you have any urgent inquiries or require assistance during the maintenance period, please contact our support team. Thank you for your cooperation.
Jan 27, 16:27 CST

Jan 27, 2026

Reports and Analytics release Version 2025.11 Patch in EMEA PROD region

Completed - The scheduled maintenance has been completed.
Jan 27, 15:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 27, 08:00 CST

Scheduled - The deployment of Reports and Analytics release version 2025.11 Patch in the AMER PROD environment is scheduled for 03:00 AM to 10:00 AM CDT. Rest assured that your access to the user interface and tax calculation services will not be affected during this maintenance period.
Jan 27, 04:02 CST

Reports and Analytics release Version 2025.11 Patch in AMER PROD region

Completed - The scheduled maintenance has been completed.
Jan 27, 11:15 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 27, 04:15 CST

ONESOURCE IDT Determination Enterprise Cloud - Backend Maintenance in the UAT Environment (AMER-AWS)

Completed - The scheduled maintenance has been completed.
Jan 27, 11:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 27, 09:00 CST

Scheduled - ONESOURCE Determination Enterprise Cloud (AMER-AWS) - We are performing an urgent maintenance activity in the UAT environment on January 27, 2026, between 10:00 AM - 12:00 PM ET. You may encounter occasional errors with the REST APIs during this activity, which may result in temporary issues with tax calculations. If this happens, simply try your request again.
Jan 25, 18:31 CST

Jan 26, 2026

Reports and Analytics release Version 2025.11 Patch in AMER UAT region

Completed - The scheduled maintenance has been completed.
Jan 26, 15:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 26, 08:30 CST

Scheduled - The deployment of Reports and Analytics release version 2025.11 Patch in the AMER UAT environment is scheduled for 3:00 AM to 10:00 AM CDT. Reports and Analytics User interface will be unavailable until the maintenance is completed. Indirect Tax calculation remains unaffected.
Jan 26, 08:23 CST

Reports and Analytics release Version 2025.11 Patch in EMEA UAT region

Completed - The scheduled maintenance has been completed.
Jan 26, 15:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 26, 08:30 CST

Scheduled - The deployment of Reports and Analytics release version 2025.11 Patch in the EMEA UAT environment is scheduled for 08:00 AM to 03:00 PM CDT. Reports and Analytics User interface will be unavailable until the maintenance is completed. Indirect Tax calculation remains unaffected.
Jan 26, 08:22 CST

ONESOURCE Global Trade - Dow Jones DPS Content Delay

Resolved - This incident has been resolved.
Jan 26, 15:01 CST

Monitoring - The issue has been resolved and we will continue to monitor .
Jan 23, 17:03 CST

Update - We are continuing to work on a fix for this issue.
Jan 23, 16:19 CST

Identified - ONESOURCE Global Trade -- Dow Jones DPS Content Delay

Thomson Reuters is currently investigating an issue with the Dow Jones DPS Content. Content updates for the Dow Jones lists are showing some delays in some entity syncing. We are working to address the issues now and will update once resolved.
Jan 23, 15:02 CST

Investigating - We are currently having issue with GTM 4 DPS Content
Jan 23, 14:52 CST

Jan 25, 2026

ONESOURCE IDT Determination Enterprise Cloud: New 2026 SSL Certificates installation in PROD on January 25, 2026

Completed - The scheduled maintenance has been completed.
Jan 25, 09:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 25, 09:00 CST

Scheduled - ONESOURCE IDT Determination Enterprise Cloud will deploy new SSL certificates in Production between 9:00 AM and 9:30 AM CST on January 25, 2026. Ensure required root/intermediate certificates are installed in your systems by January 24, 2026.
Jan 5, 14:21 CST

Jan 24, 2026

ONESOURCE Trusts [APAC]

Completed - The scheduled maintenance has been completed.
Jan 24, 10:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 24, 09:30 CST

Scheduled - ONESOURCE TRUSTS [APAC] will undergo scheduled maintenance and will be unavailable from Sunday, January 25th 02:30 AEDT to 03:30 AEDT.
Jan 21, 06:40 CST

ONESOURCE Corporate Tax NextGen [APAC]

Completed - The scheduled maintenance has been completed.
Jan 24, 10:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 24, 09:30 CST

Scheduled - ONESOURCE Corporate Tax NextGen [APAC] will undergo scheduled maintenance and will be unavailable from Sunday, January 25th 02:30 AEDT to 03:30 AEDT.
Jan 21, 06:39 CST

ONESOURCE API Administration Emergency Maintenance in UAT

Completed - The scheduled maintenance has been completed.
Jan 24, 01:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 24, 00:00 CST

Scheduled - ONESOURCE Events is currently at capacity in the UAT environment due to licensed subscription limits. To restore and expand subscription capacity and improve throughput, reliability, and policy support, ONESOURCE API Administration will upgrade API Management in UAT to the Standard plan. A Postgres database upgrade will also be performed during this maintenance.

Maintenance window: 12:00 AM – 1:00 AM CST (up to 1 hour).

During this time, publishers will be unable to connect/publish events. Subscribers/webhooks will remain configured but will not receive new events until publishing resumes.

If you experience issues, please retry after the maintenance window. We apologize for the inconvenience and appreciate your patience. For urgent assistance, please contact our support team.
Jan 20, 13:14 CST

ONESOURCE Corporate Tax NextGen [EMEA]

Completed - The scheduled maintenance has been completed.
Jan 24, 00:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 23, 20:30 CST

Scheduled - ONESOURCE Corporate Tax NextGen [EMEA] will undergo scheduled maintenance and will be unavailable from Saturday, January 24th 02:30 GMT to 06:30 GMT
Jan 21, 06:38 CST

Reports and Analytics Enterprise Cloud

Resolved - This incident has been resolved.
Jan 24, 00:06 CST

Investigating - We are experiencing delay of 7 hours in processing the Reports and Analytics Enterprise Cloud data, we are working on the catch up.
Jan 23, 19:32 CST

Jan 23, 2026

ONESOURCE IDT Determination Original Cloud: New 2026 SSL Certificates installation in PROD on January 23, 2026

Completed - The scheduled maintenance has been completed.
Jan 23, 22:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 23, 21:00 CST

Scheduled - ONESOURCE IDT Determination Original Cloud will deploy new SSL certificates in PROD between 9:00 PM and 10:00 PM CST on January 23, 2026. Ensure required certificates are installed in your systems by January 22, 2026.
Jan 9, 15:49 CST

Error message when opening a tax return

Resolved - This incident has been resolved.
Jan 23, 09:50 CST

Update - We have mitigated the issue as of 19:30 CST. We will continue to monitor and provide updates if there are any new developments.
Jan 22, 21:45 CST

Update - As work continues, we have seen a reduction errors but continue to investigate.
Jan 22, 18:52 CST

Investigating - We are currently experiencing intermittent issues with GoSystem Tax RS, we are receiving reports of customers getting an error message when trying to open a tax return. Our team is actively working to resolve this matter as quickly as possible. We apologize for any inconvenience and appreciate your understanding and patience.

Further updates will be provided here as soon as we have more information. If you have any questions, please contact Customer Support.
Jan 22, 16:12 CST

OSPI Platform – UAT Major Release January 2026

Completed - The scheduled maintenance has been completed.
Jan 23, 06:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 23, 00:00 CST

ONESOURCE Income Tax

Completed - The scheduled maintenance has been completed.
Jan 23, 01:30 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 23, 00:00 CST

Scheduled - ONESOURCE Income Tax will be undergoing maintenance on Friday, Jan 23rd between 12:00am – 1:30am CT
Jan 6, 14:23 CST

Jan 22, 2026

Intermittent Tax Calculation API failures in AMER, EMEA, and OCI PROD

Resolved - Dear Customers,

We experienced intermittent issues with tax calculation REST API in the ONESOURCE Indirect Tax Determination - AMER & EMEA UAT and Production environment between 10:34 AM and 10:36 AM CT on January 22nd. The issue is already mitigated now.

We apologize for any inconvenience and appreciate your understanding and patience.

Further details will be provided in the formal RCA. If you have any questions, please contact Customer Support.
Jan 22, 11:09 CST

Investigating - We are currently experiencing intermittent issues with the REST API feature with our ONESOURCE Indirect Tax Determination Enterprise service. Our team is actively working to resolve this matter as quickly as possible. We apologize for any inconvenience and appreciate your understanding and patience.

Further updates will be provided here as soon as we have more information. If you have any questions, please contact Customer Support.
Jan 22, 10:57 CST

ONESOURCE API Administration January 2026 release – AMER

Completed - The scheduled maintenance has been completed.
Jan 22, 05:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 22, 00:00 CST

Scheduled - ONESOURCE API Administration will undergo scheduled maintenance to enhance system performance, reliability, and UI features. Some services may be temporarily affected; please try again later if you encounter issues. We apologize for any inconvenience and appreciate your patience. For urgent assistance during this period, contact our support team. Thank you for your cooperation. For more on API Administration, see the Guide.
Jan 13, 02:37 CST

Jan 21, 2026

ONESOURCE IDT Determination Original Cloud: New 2026 SSL Certificates installation in UAT on January 21, 2026

Completed - The scheduled maintenance has been completed.
Jan 21, 22:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 21, 21:01 CST

Scheduled - ONESOURCE IDT Determination Original Cloud will deploy new SSL certificates in UAT between 9:00 PM and 10:00 PM CST on January 21, 2026. Ensure required certificates are installed in your systems by January 20, 2026.
Jan 9, 15:49 CST

ONESOURCE API Administration January 2026 release – EMEA

Completed - The scheduled maintenance has been completed.
Jan 21, 21:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 21, 16:00 CST

ONESOURCE Data Query

Completed - The scheduled maintenance has been completed.
Jan 21, 20:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 21, 16:00 CST

Scheduled - ONESOURCE Data Query will be undergoing maintenance on Wednesday, Jan 21st between 4:00pm – 8:00pm CT.
Jan 16, 16:56 CST

ONESOURCE API Administration January 2026 release – APAC

Completed - The scheduled maintenance has been completed.
Jan 21, 12:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 21, 07:00 CST

ONESOURCE IDT Determination Enterprise Cloud - Backend Maintenance in the UAT Environment (AMER-AWS)

Completed - The scheduled maintenance has been completed.
Jan 21, 11:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 21, 09:00 CST

Scheduled - ONESOURCE Determination Enterprise Cloud (AMER-AWS) - We are performing an urgent maintenance activity in the UAT environment on January 21, 2026, between 10:00 AM - 12:00 PM ET. You may encounter occasional errors with the REST APIs during this activity, which may result in temporary issues with tax calculations. If this happens, simply try your request again.
Jan 20, 15:33 CST

ONESOURCE API Administration Backend Services January 2026 release in all Production regions

Completed - The scheduled maintenance has been completed.
Jan 21, 06:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 21, 01:00 CST

Scheduled - ONESOURCE API Administration will be performing scheduled maintenance on our systems to ensure optimal performance and reliability. During this maintenance window, certain services may experience some issues. In such cases, we recommend trying after some time. We apologize for any inconvenience this may cause and appreciate your patience and understanding. If you have any urgent inquiries or require assistance during the maintenance period, please contact our support team. Thank you for your cooperation.

To explore the capabilities of API Administration, please refer to the Guide.
Jan 13, 02:28 CST

ONESOURCE API Administration Backend Services and UI January 2026 release in UAT.

Completed - The scheduled maintenance has been completed.
Jan 21, 03:00 CST

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 20, 22:00 CST

Jan 20, 2026

Scheduled Maintenance

ONESOURCE Oracle Fusion Rate to Regime Content release for BRAZIL JANUARY 2026 Jan 22, 2026 12:30 - Jan 23, 2026 12:30 CST

UAT - ONESOURCE Platform Security Maintenance Application server patching in February 2026. Feb 4, 2026 00:00-04:00 CST

ONESOURCE Determination Enterprise Cloud– Version 2026.01 Release Information (PROD AMER environment) Feb 4, 2026 03:00-09:00 CST

ONESOURCE Determination Anywhere – Version 2026.01 Release Information (PROD environment) Feb 4, 2026 05:00-11:00 CST

ONESOURCE API Administration Backend Services and UI February 2026 release in UAT. Feb 4, 2026 22:00 - Feb 5, 2026 03:00 CST

OSPI Platform – AMER Major release for January 2026 Feb 5, 2026 00:00-06:00 CST

ONESOURCE API Administration Backend Services February 2026 release in all Production regions Feb 5, 2026 01:00-06:00 CST

ONESOURCE API Administration February 2026 release – APAC Feb 5, 2026 07:00-12:00 CST

APAC - ONESOURCE Platform Security Maintenance Application server patching for February 2026 . Feb 5, 2026 07:00-11:00 CST

ONESOURCE Indirect Compliance Maintenance Event (R2026.02) planned on Thursday 05th February 2026 Feb 5, 2026 07:00-11:00 CST

ONESOURCE API Administration February 2026 release – EMEA Feb 5, 2026 16:00-21:00 CST

EMEA - ONESOURCE Platform Security Maintenance Application server patching February 2026. Feb 5, 2026 18:00-22:00 CST

ONESOURCE Indirect Compliance Maintenance Event (R2026.02) planned on Thursday 05th February 2026 Feb 5, 2026 18:30-22:30 CST

ONESOURCE Income Tax Feb 6, 2026 00:00-01:30 CST

ONESOURCE API Administration February 2026 release – AMER Feb 6, 2026 00:00-05:00 CST

APAC - ONESOURCE Platform Security Maintenance Application server patching for February 2026 Feb 6, 2026 07:00-11:00 CST

UAT - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb 7, 2026 00:30-07:30 CST

APAC - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb 7, 2026 06:00-14:00 CST

EMEA - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb 7, 2026 18:00 - Feb 8, 2026 02:00 CST

AMER - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb 7, 2026 23:30 - Feb 8, 2026 07:30 CST

ONESOURCE GTM – AWS Maintenance Feb 8, 2026 00:00-17:00 CST

GoSystem Tax RS Maintenance Feb 8, 2026 00:00-03:00 CST

ONESOURCE Income Tax Maintenance Feb 8, 2026 00:00-03:00 CST

AMER - ONESOURCE Platform Security Maintenance Application server patching for February 2026. Feb 9, 2026 00:00-04:00 CST

ONESOURCE Determination – Configuration API Version 2026.1 Production Release Information (EMEA Region) Feb 9, 2026 03:00-09:00 CST

ONESOURCE Determination – Configuration API Version 2026.1 Production Release Information (AMER Region) Feb 10, 2026 03:00-10:00 CST

ONESOURCE Tax Information Release OTIR Release 25.07 17th February 2026 (AMERS) Feb 17, 2026 19:00 - Feb 18, 2026 06:00 CST

ONESOURCE Income Tax Feb 20, 2026 00:00-01:30 CST

ONESOURCE GTM – AWS Maintenance Feb 22, 2026 00:00-17:00 CST

ONESOURCE Global Trade - AS2 Certificate Update Feb 22, 2026 09:00-11:00 CST

ONESOURCE GTM – AWS Maintenance Mar 8, 2026 00:00-18:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 21st March 2026 (AMERS) Mar 21, 2026 22:00 - Mar 22, 2026 07:00 CDT

ONESOURCE GTM – AWS Maintenance Mar 22, 2026 00:00-17:00 CDT

ONESOURCE Tax Information Release OTIR Release 26.01 21st April 2026 (AMERS) Apr 21, 2026 19:00 - Apr 22, 2026 06:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 25th April 2026 (AMERS) Apr 25, 2026 22:00 - Apr 26, 2026 07:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 23rd May 2026 (AMERS) May 23, 2026 22:00 - May 24, 2026 07:00 CDT

ONESOURCE Tax Information Release OTIR Release 26.02 16th June 2026 (AMERS) Jun 16, 2026 19:00 - Jun 17, 2026 06:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 27th June 2026 (AMERS) Jun 27, 2026 22:00 - Jun 28, 2026 07:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 25th July 2026 (AMERS) Jul 25, 2026 22:00 - Jul 26, 2026 07:00 CDT

ONESOURCE Tax Information Release OTIR Release 26.03 11th August 2026 (AMERS) Aug 11, 2026 19:00 - Aug 12, 2026 06:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 22nd August 2026 (AMERS) Aug 22, 2026 22:00 - Aug 23, 2026 07:00 CDT

ONESOURCE Tax Information Release OTIR Release 26.04 20th October 2026 (AMERS) Oct 20, 2026 19:00 - Oct 21, 2026 06:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 24th October 2026 (AMERS) Oct 24, 2026 22:00 - Oct 25, 2026 07:00 CDT

ONESOURCE Tax Information Reporting System Maintenance 21st November 2026 (AMERS) Nov 21, 2026 22:00 - Nov 22, 2026 07:00 CST

ONESOURCE Tax Information Release OTIR Release 26.05 1st December 2026 (AMERS) Dec 1, 2026 19:00 - Dec 2, 2026 06:00 CST

ONESOURCE Tax Information Release OTIR Release 26.06 22nd December 2026 (AMERS) Dec 22, 2026 19:00 - Dec 23, 2026 06:00 CST

ONESOURCE Tax Information Reporting System Maintenance 26th December 2026 (AMERS) Dec 26, 2026 22:00 - Dec 27, 2026 07:00 CST

ONESOURCE Tax Information Release OTIR Release 26.07 16th February 2027 (AMERS) Feb 16, 2027 19:00 - Feb 17, 2027 06:00 CST

Past Incidents

ONESOURCE Oracle Fusion Rate to Regime Content release for BRAZIL JANUARY 2026 Jan `22`, `2026` `12:30` - Jan `23`, `2026` `12:30` CST

UAT - ONESOURCE Platform Security Maintenance Application server patching in February 2026. Feb `4`, `2026` `00:00`-`04:00` CST

ONESOURCE Determination Enterprise Cloud– Version 2026.01 Release Information (PROD AMER environment) Feb `4`, `2026` `03:00`-`09:00` CST

ONESOURCE Determination Anywhere – Version 2026.01 Release Information (PROD environment) Feb `4`, `2026` `05:00`-`11:00` CST

ONESOURCE API Administration Backend Services and UI February 2026 release in UAT. Feb `4`, `2026` `22:00` - Feb `5`, `2026` `03:00` CST

OSPI Platform – AMER Major release for January 2026 Feb `5`, `2026` `00:00`-`06:00` CST

ONESOURCE API Administration Backend Services February 2026 release in all Production regions Feb `5`, `2026` `01:00`-`06:00` CST

ONESOURCE API Administration February 2026 release – APAC Feb `5`, `2026` `07:00`-`12:00` CST

APAC - ONESOURCE Platform Security Maintenance Application server patching for February 2026 . Feb `5`, `2026` `07:00`-`11:00` CST

ONESOURCE Indirect Compliance Maintenance Event (R2026.02) planned on Thursday 05th February 2026 Feb `5`, `2026` `07:00`-`11:00` CST

ONESOURCE API Administration February 2026 release – EMEA Feb `5`, `2026` `16:00`-`21:00` CST

EMEA - ONESOURCE Platform Security Maintenance Application server patching February 2026. Feb `5`, `2026` `18:00`-`22:00` CST

ONESOURCE Indirect Compliance Maintenance Event (R2026.02) planned on Thursday 05th February 2026 Feb `5`, `2026` `18:30`-`22:30` CST

ONESOURCE Income Tax Feb `6`, `2026` `00:00`-`01:30` CST

ONESOURCE API Administration February 2026 release – AMER Feb `6`, `2026` `00:00`-`05:00` CST

APAC - ONESOURCE Platform Security Maintenance Application server patching for February 2026 Feb `6`, `2026` `07:00`-`11:00` CST

UAT - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `00:30`-`07:30` CST

APAC - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `06:00`-`14:00` CST

EMEA - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `18:00` - Feb `8`, `2026` `02:00` CST

AMER - ONESOURCE Platform Security Maintenance Database server patching for February 2026. Feb `7`, `2026` `23:30` - Feb `8`, `2026` `07:30` CST

ONESOURCE GTM – AWS Maintenance Feb `8`, `2026` `00:00`-`17:00` CST

GoSystem Tax RS Maintenance Feb `8`, `2026` `00:00`-`03:00` CST

ONESOURCE Income Tax Maintenance Feb `8`, `2026` `00:00`-`03:00` CST

AMER - ONESOURCE Platform Security Maintenance Application server patching for February 2026. Feb `9`, `2026` `00:00`-`04:00` CST

ONESOURCE Determination – Configuration API Version 2026.1 Production Release Information (EMEA Region) Feb `9`, `2026` `03:00`-`09:00` CST

ONESOURCE Determination – Configuration API Version 2026.1 Production Release Information (AMER Region) Feb `10`, `2026` `03:00`-`10:00` CST

ONESOURCE Tax Information Release OTIR Release 25.07 17th February 2026 (AMERS) Feb `17`, `2026` `19:00` - Feb `18`, `2026` `06:00` CST

ONESOURCE Income Tax Feb `20`, `2026` `00:00`-`01:30` CST

ONESOURCE GTM – AWS Maintenance Feb `22`, `2026` `00:00`-`17:00` CST

ONESOURCE Global Trade - AS2 Certificate Update Feb `22`, `2026` `09:00`-`11:00` CST

ONESOURCE GTM – AWS Maintenance Mar `8`, `2026` `00:00`-`18:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 21st March 2026 (AMERS) Mar `21`, `2026` `22:00` - Mar `22`, `2026` `07:00` CDT

ONESOURCE GTM – AWS Maintenance Mar `22`, `2026` `00:00`-`17:00` CDT

ONESOURCE Tax Information Release OTIR Release 26.01 21st April 2026 (AMERS) Apr `21`, `2026` `19:00` - Apr `22`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 25th April 2026 (AMERS) Apr `25`, `2026` `22:00` - Apr `26`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 23rd May 2026 (AMERS) May `23`, `2026` `22:00` - May `24`, `2026` `07:00` CDT

ONESOURCE Tax Information Release OTIR Release 26.02 16th June 2026 (AMERS) Jun `16`, `2026` `19:00` - Jun `17`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 27th June 2026 (AMERS) Jun `27`, `2026` `22:00` - Jun `28`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 25th July 2026 (AMERS) Jul `25`, `2026` `22:00` - Jul `26`, `2026` `07:00` CDT

ONESOURCE Tax Information Release OTIR Release 26.03 11th August 2026 (AMERS) Aug `11`, `2026` `19:00` - Aug `12`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 22nd August 2026 (AMERS) Aug `22`, `2026` `22:00` - Aug `23`, `2026` `07:00` CDT

ONESOURCE Tax Information Release OTIR Release 26.04 20th October 2026 (AMERS) Oct `20`, `2026` `19:00` - Oct `21`, `2026` `06:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 24th October 2026 (AMERS) Oct `24`, `2026` `22:00` - Oct `25`, `2026` `07:00` CDT

ONESOURCE Tax Information Reporting System Maintenance 21st November 2026 (AMERS) Nov `21`, `2026` `22:00` - Nov `22`, `2026` `07:00` CST

ONESOURCE Tax Information Release OTIR Release 26.05 1st December 2026 (AMERS) Dec `1`, `2026` `19:00` - Dec `2`, `2026` `06:00` CST

ONESOURCE Tax Information Release OTIR Release 26.06 22nd December 2026 (AMERS) Dec `22`, `2026` `19:00` - Dec `23`, `2026` `06:00` CST

ONESOURCE Tax Information Reporting System Maintenance 26th December 2026 (AMERS) Dec `26`, `2026` `22:00` - Dec `27`, `2026` `07:00` CST

ONESOURCE Tax Information Release OTIR Release 26.07 16th February 2027 (AMERS) Feb `16`, `2027` `19:00` - Feb `17`, `2027` `06:00` CST