Absolutely. You can adjust multiple tax returns dating as far back as 10 years. This is why it’s important to make sure you hang on to old receipts, tax slips, and other documentation. When you have these, it’s never too late to make changes.
You can use 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.
*TurboTax doesn’t have ReFILE services available for residents of Québec.
You can also 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.
Or you can also 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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