When to file your corporation income tax return
File your return no later than six months after the end of each tax year. The tax year of a corporation is its fiscal period.
When the corporation's tax year ends on the last day of a month, file the return by the last day of the sixth month after the end of the tax year.
When the last day of the tax year is not the last day of a month, file the return by the same day of the sixth month after the end of the tax year.
- If your tax year ends March 31, your filing due date is September 30.
- If your tax year ends August 31, your filing due date is February 28.
- If your tax year ends September 23, your filing due date is March 23.
When a filing due date falls on a Saturday, Sunday, or public holiday recognized by the CRA, your return is considered on time if the CRA receives it or if it is postmarked on or before the next business day. For more information, go to Important dates for corporations.
You must file your return on time to avoid penalties.
You must file a return no later than three years after the end of a tax year to receive a tax refund.
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