The CRA online services are available 21 hours a day. Due to daily maintenance activities, the services are not available for three hours a day from 3 am to 6 am (Eastern time).

The CRA online services may also be unavailable during the following maintenance schedule:

• Friday, February 2, 2024 until Monday, February 5, 2024
• Friday, May 10, 2024 until Monday, May 13, 2024
• Friday, October 18, 2024 until Monday, October 21, 2024