CRA Interruption of services for annual conversion from Oct 16-19, 2026

Prior to the opening of the upcoming EFILE program, the Canada Revenue Agency's (CRA) EFILER Information System will undergo its annual conversion process.

The following Canada Revenu Agency (CRA) services will be temporarily unavailable from Friday, October 16, 2026, at 10:00 p.m. eastern time until Monday, October 19, 2026. at 8:30 a.m. eastern time:

• EFILE online services (Register for EFILE, Yearly renewal, Account maintenance and Transmission history)

• Pre-authorized debit web service

The following services will be temporarily unavailable from Friday, October 16, 2026, at 10:00 p.m. eastern time until Sunday, October 18, 2026, at 6:00 a.m. eastern time

• Transmission of T1 and T3 returns

• ReFILE service

• Foreign reporting transmission web services, such as Forms T1134 and T1135

• Client Data Enquiry service

• Auto-fill my return service

• Email notifications from the CRA

The following services will be temporarily unavailable from Friday, October 16, 2026, at 10:00 p.m. eastern time until Sunday, October 19, 2026, at 6:00 a.m. eastern time:

• Transmission of T2 returns

• AgriStability/AgriInvest Corporation forms transmission web service

• Transmission web service for authorizing or cancelling a business consent

• Special Elections and Returns web services (T1 and T2)

On October 19, 2026, you will receive a message inviting you to renew your participation for the 2027 EFILE program.