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How to request an amendment with ReFILE and your tax software
You may be able to make the correction, using your tax software, like TurboTax, and then file using the ReFILE option, based on the year of the return you want to adjust. Using the same software you used to file your original tax return, you can make changes to your current and previous 2 tax years through Re-FILE. However, you cannot use ReFILE in the following situations:
Please visit the link provided for further clarifications:
TurboTax: How Can I Amend My Tax Return?
CRA: ReFILE: Online adjustments for income tax and benefit returns
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