Thomson Reuters incident

High latency and Intermittent failures for Tax calculations in AMER UAT

Thomson Reuters experienced a minor incident on April 29, 2026 affecting ONESOURCE Determination Enterprise Cloud (AWS AMER), lasting 4h 47m. The incident has been resolved; the full update timeline is below.

Started: Apr 29, 2026, 08:53 AM UTC
Resolved: Apr 29, 2026, 01:40 PM UTC
Duration: 4h 47m
Detected by Pingoru: Apr 29, 2026, 08:53 AM UTC

Affected components

ONESOURCE Determination Enterprise Cloud (AWS AMER)

Update timeline

investigating Apr 29, 2026, 08:53 AM UTC

We are currently experiencing intermittent issues with the Tax calculation Service feature with our Onesource Indirect Tax Determination Enterprise service.
resolved Apr 29, 2026, 01:40 PM UTC

Dear Customers, We experienced high latency & intermittent failure with tax calculations in the ONESOURCE Indirect Tax Determination - AMER UAT environment between 2:48 AM and 7:50 AM EST on April 29th. 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.