Hours of service

The Corporation Internet Filing service is available 21 hours a day, Monday to Saturday, and 20 hours on Sunday.

For technical reasons, corporation income tax returns may be filed over the Internet only during the following hours:

Region	Monday to Saturday	Sunday
British Columbia and Yukon (Pacific Time)	3:00 a.m. to midnight	3:00 a.m. to 11 p.m.
Alberta, Northwest Territories, and Nunavut (Mountain Time)	4:00 a.m. to 1:00 a.m.	4:00 a.m. to midnight
Saskatchewan, Manitoba, Northwest Territories, and Nunavut (Central Time)	5:00 a.m. to 2:00 a.m.	5:00 a.m. to 1:00 a.m.
Ontario, Quebec, and Nunavut (Eastern Time)	6:00 a.m. to 3:00 a.m.	6:00 a.m. to 2:00 a.m.
New Brunswick, Nova Scotia, and Prince Edward Island (Atlantic Time)	7:00 a.m. to 4:00 a.m.	7:00 a.m. to 3:00 a.m.
Newfoundland and Labrador (Newfoundland Time)	7:30 a.m. to 4:30 a.m.	7:30 a.m. to 3:30 a.m.

If you need assistance, call the Corporation Internet Filing Help Desk toll free at 1-800-959-2803 during our Help Desk hours of service.

The Corporation Internet Filing Help Desk can answer your questions about Corporation Internet Filing.

The Help Desk provides bilingual service and is available, Monday to Friday, except statutory holidays, from 9:00 a.m. to 4:00 p.m. local time.

Contact the Help Desk toll free at 1-800-959-2803.