Thank you for your question.
Per the CRA; You can request a change to your tax return by amending specific line(s) of your return. You cannot, however, refile a tax return once you have already submitted it.
Here is a Turbotax guide on how to amend your tax return.
Here is an FAQ on how to amend your tax return.
If you have any questions, you can contact our phone support team or contact us via private chat on Facebook or Twitter.
