Correcting your electronic tax return

Once you have received a confirmation number, this means the CRA has accepted your corporation tax return for processing. At this point, you are not able to change or correct your return and re-send it through the Corporation Internet Filing service.

If you have tried to send your electronic return through the Corporation Internet Filing service and we need additional information or clarification of the tax return before accepting it for processing, we will send you a message explaining which area you should correct. This means that your electronic corporation tax return was not accepted for processing.

If you need more help, contact the Help Desk. Refer to the Corporation Internet Filing Help Desk hours of service.

• Once the message(s) is displayed, the transmission session is over. Before leaving the Corporation Internet Filing Web site, you should save, print, or make note of all messages we give.
• To make changes to your saved return, you'll have to leave the Corporation Internet Filing Web site and return to the tax preparation software on your computer. Find your copy of the tax return and open the file to make the necessary changes.
• Review our message(s) describing the problem(s) and suggesting how to change your return.
• After making the required changes, re-save your tax return in the correct extension/format (".cor" extension). You can then return to the Corporation Internet Filing transmission Web page and send us your corrected electronic tax return. You'll have to enter your three items of identification again, then attach the newly saved electronic tax return.
• When the corporation income tax return is successfully submitted to us, we'll send you a confirmation number that you should keep for your records.