2026 Combined release and system maintenance schedule
This table lists the dates and times that ONESOURCE Tax Information Reporting (OTIR) may be unavailable during 2026 due to a scheduled event (such as a software release or system maintenance). We'll publish advance notice on the Corporate Status website.
Dates | Scheduled event | Start time | End time | Deadline for customer requests |
|---|---|---|---|---|
February 17, 2026 | OTIR Release 25.07 | 7 PM CT February 17, 2026 | 6 AM CT February 18, 2026 | January 6, 2026 |
March 21, 2026 | OTIR System maintenance | 10 PM CT March 21, 2026 | 7 AM CT March 22, 2026 | N/A |
April 21, 2026 | OTIR Release 26.01 | 7 PM CT April 21, 2026 | 6 AM CT April 22, 2026 | March 10, 2026 |
April 25, 2026 | OTIR System maintenance | 10 PM CT April 25, 2026 | 7 AM CT April 26, 2026 | N/A |
May 23, 2026 | OTIR System maintenance | 10 PM CT May 23, 2026 | 7 AM CT May 24, 2026 | N/A |
June 16, 2026 | OTIR Release 26.02 | 7 PM CT June 16, 2026 | 6 AM CT June 17, 2026 | May 5, 2026 |
June 27, 2026 | OTIR System maintenance | 10 PM CT June 27, 2026 | 7 AM CT June 28, 2026 | N/A |
July 25, 2026 | OTIR System maintenance | 10 PM CT July 25, 2026 | 7 AM CT July 26, 2026 | N/A |
August 11, 2026 | OTIR Release 26.03 | 7 PM CT August 11, 2026 | 6 AM CT August 12, 2026 | June 30, 2026 |
August 22, 2026 | OTIR System maintenance | 10 PM CT August 22, 2026 | 7 AM CT August 23, 2026 | N/A |
October 20, 2026 | OTIR Release 26.04 | 7 PM CT October 20, 2026 | 6 AM CT October 21, 2026 | September 8, 2026 |
October 24, 2026 | OTIR System maintenance | 10 PM CT October 24, 2026 | 7 AM CT October 25, 2026 | N/A |
November 21, 2026 | OTIR System maintenance | 10 PM CT November 21, 2026 | 7 AM CT November 22, 2026 | N/A |
December 1, 2026 | OTIR Release 26.05 | 7 PM CT December 1, 2026 | 6 AM CT December 2, 2026 | October 21, 2026 |
December 22, 2026 | OTIR Release 26.06 | 7 PM CT December 22, 2026 | 6 AM CT December 23, 2026 | November 12, 2026 |
December 26, 2026 | OTIR System maintenance | 10 PM CT December 26, 2026 | 7 AM CT December 27, 2026 | N/A |
February 16, 2027 | OTIR Release 26.07 | 7 PM CT February 16, 2027 | 6 AM CT February 17, 2027 | January 5, 2026 |