How to change a return
If you have more information that could change the result of a return that you have already sent to the CRA, do not file another return for that year. Wait until you receive your notice of assessment before asking for changes.
Generally, you can only request a change to a return for a tax year ending in any of the 10 previous calendar years. For example, a request made in 2024 must relate to a tax year after 2013 to be considered.
You can change your return in any of the following ways:
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using the ReFILE service if your return was filed electronically using a certified software. For more information, go to canada.ca/refile
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signing in to My Account at canada.ca/my-cra-account and using "Change my return"
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sending Form T1-ADJ, T1 Adjustment Request, by mail, as well as any supporting documents, if you have not sent them before to support your original claim
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Note If the CRA has assessed your taxes owing for a year that you did not file a tax return, you must file a paper return for that year if you want to make a change. |
For more information, go to canada.ca/change-tax-return.
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