Some Canada Revenue Agency systems will be undergoing annual maintenance. As a result, the following service interruptions will occur during the time frames noted below:
- The T3 EFILE and T1135 T3 web services will be unavailable from 11:59 p.m. on Friday, January 20, 2023, until 8:30 a.m. on Monday, February 20, 2023, (Eastern Time).
- The Pre-authorized debit web service will be unavailable from 11:59 p.m. on Friday, January 27, 2023, until 6:00 a.m. on Monday, February 20, 2023, (Eastern Time).
- The EFILE (T1), ReFILE and T1134/T1135 web services will be unavailable from 11:59 p.m. on Friday, January 27, 2023, until 8:30 a.m. on Monday, February 20, 2023, (Eastern Time).
- The transmission web service for authorizing or cancelling a representative will be unavailable from 8:00 p.m. on Friday, February 3, 2023, until 6:00 a.m. on Monday, February 6, 2023, (Eastern Time).
- The Auto-fill my return and Express NOA services will be unavailable from 11:00 p.m. on Friday, February 3, 2023, until 6:00 a.m. on Monday, February 6, 2023, (Eastern Time).
- The EFILE online service “Transmission History” will be unavailable from 11:00 p.m. on Friday, February 3, 2023, until 8:30 a.m. on Monday, February 6, 2023, (Eastern Time).
Note: There will be no interruption of service to the following EFILE online services: “Register for EFILE”, “Yearly renewal” and “Account maintenance”.
