You can make changes to a filed tax return by filing an adjustment. The Canada Revenue Agency (CRA) requires that you wait until you’ve received your Notice of Assessment (NOA) before filing an adjustment.
Once you’ve reviewed your NOA, there are 3 ways to make changes to your tax return.
1. ReFILE
Using ReFILE is one of the fastest, easiest, and most cost-effective ways to make changes to your previously filed tax return. Simply submit your adjustments using the same certified NETFILE software you used when you filed your tax return.
2. CRA My Account
Sign in to your CRA My Account and click where it says “Change my return”. After selecting the tax year and line that needs to be changed, you can input the correct information to submit your changes.
3. Mail
To make changes to your tax return by mail, you’ll have to complete a T1 Adjustment Request and send it with all supporting documents for the change to your local tax centre.
For more information, please see TurboTax webpage: How to Change Your Tax Return After You've Filed
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