CRA System Maintenance (Interruption of Services)

Some Canada Revenue Agency (CRA) systems will be undergoing annual maintenance. As a result, the following service interruptions will occur during the time frames noted below.

The following services will be temporarily unavailable from 11:00 p.m. on Friday, January 9, 2026, until 6:00 a.m. on Monday, January 12, 2026 (Eastern Time):

• EFILE for Individuals (T1) and Trusts (T3)
• Foreign reporting transmission web services, such as Forms T1134 and T1135
• ReFILE
• EFILE online service “Transmission History”
• Auto-fill my return
• Notice of assessment in tax software
• Client Data Enquiry

Note: There will be no interruption of service to the following EFILE online services:

• Register for EFILE
• Yearly renewal
• Account maintenance