CRA System Maintenance: Jan. 20 @ 11:59 pm ET until Feb. 20 @ 8:30 am ET

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, T2), 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
• Account maintenance