How to change a return

How to change a return

If you have more information that would change a return you have already sent to the CRA, do not file another paper 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 2019 must relate to the 2009 or a later tax year to be considered.

You can change your return by:

• using the ReFILE service if your return was filed electronically using a certified software. For more information, see canada.ca/refile

• going online to My Account at canada.ca/my-cra-account and using "Change my return"

• sending a paper Form T1-ADJ, T1 Adjustment Request or a signed letter giving the details of your request (including the years of the returns to be changed), your social insurance number, your address, and a telephone number where the CRA can reach you during the day. Also attach supporting documents for the changes you are asking for and, if you have not sent them before, supporting documents for your original claim

  Note
  If your return was arbitrarily assessed by the CRA and you would like to make a change, you must file a paper tax return for the year(s) in question.

For more information, go to canada.ca/change-tax-return.