After you File, What To Know After You File

How Can I Amend My Tax Return?

Fortunately, if you’ve made an error on your tax return and need to amend it, don’t worry, there are a few ways to do so that you’ll find quite simple.

First and foremost, if you need to amend your tax return, do not file another return for that year.

You must wait to receive your Notice of Assessment before making any changes to your tax return. Amendments can be made for 10 previous years, so if you are filing this year’s (2019), you can only amend back to 2009.

There are three ways to make amendments to your tax return: through CRA My Account, Re-File using your tax solution, or by mail. There are rules and limitations for each one, and we’ll take you through them so you have a better understanding of which one to choose.

Requesting an Amendment Online through CRA My Account (or Represent a Client on behalf of someone else)

Requesting an amendment to your tax return online simply requires you to log in to you CRA My Account and click “Change my return”.  You select the line that needs to be correct, and input the corrected value. Do keep in mind that you cannot request an amendment to change any of the following:

  • a bankruptcy return
  • a tax return where 9 reassessments exist for a particular tax year
  • a tax return that has not been assessed
  • a tax return prior to the year of bankruptcy
  • carry-back amounts such as capital or non-capital losses
  • an elected split-pension amount
  • a return of an international or non-resident client (including deemed residents of Canada, newcomers to Canada, and individuals who left Canada during the year)
  • a return where you have income from a business with a permanent establishment outside your province or territory of residence


Requesting an Amendment using ReFILE and your tax solution

Depending on the year of the return you want to adjust, you might be able to make the correction, using your tax solution, like TurboTax, and then remit using the ReFILE option.  You can make changes to your current and previous 2 tax years through Re-FILE using the same software you used to file originally.  You cannot use ReFILE in the following situations:

  • Making or amending an election
  • Applying for certain benefits
  • Applying for the disability tax credit
  • Have a current reassessment in progress
  • Have not yet received the original return assessment
  • If you have to change personal information


Requesting an Amendment by Mail

You will have to complete a T1-ADJ T1 Adjustment Request. You can download a PDF copy of it from the CRA’s website by clicking here. As an alternative, you can also submit a signed letter with the following details:

  • The years of the returns to be changed
  • Your social insurance number
  • Your full address
  • A telephone number where you can be reached during the day

Whichever option you choose, you’ll have to send all supporting documents for your amendment – including those for the original assessment, – to your tax center (click here to find out which one is closest to you).

Processing Times

  • Within 2 weeks if requested online
  • Within 8 weeks if requested by mail

Processing might slightly be longer if you your request is sent in spring or early summer, needs further review, or if the CRA has to contact you or your authorized representative for more information or documentation.

Once your review is complete, you will receive from the CRA either:

  • a Notice of Reassessment showing changes to your return
  • a letter explaining why the changes you asked for were not applied

All in all, you can retire any worries if you suddenly realize that you have to make changes to your tax return. Follow the instructions above and the process should be simple and easy.