Thomson Reuters incident

OneSource Indirect Tax Enterprise UI outage across UAT environments

Thomson Reuters experienced a minor incident on June 18, 2026 affecting ONESOURCE Determination Enterprise Cloud (AWS AMER) and ONESOURCE Determination Enterprise Cloud (AWS EMEA), lasting 25m. The incident has been resolved; the full update timeline is below.

Started: Jun 18, 2026, 08:15 AM UTC
Resolved: Jun 18, 2026, 08:41 AM UTC
Duration: 25m
Detected by Pingoru: Jun 18, 2026, 08:15 AM UTC

Affected components

ONESOURCE Determination Enterprise Cloud (AWS AMER)ONESOURCE Determination Enterprise Cloud (AWS EMEA)

Update timeline

investigating Jun 18, 2026, 08:15 AM UTC

We experienced outage in Loading the ONESOURCE Tax page - AMER, EMEA and OCI UAT environments starting 2:13 AM CT on May 18th. The issue is already mitigated. 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.
resolved Jun 18, 2026, 08:41 AM UTC

Dear Customers, We experienced disruption in accessing User Interface[ UI] across UAT environments in the ONESOURCE Indirect Tax Determination between 3:50 AM ET and 4:10 AM ET on June 18th. 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.