Yes, if you need to correct an amount on your tax return, you can use ReFILE. If you are using TurboTax Online, you can ReFILE a return that has already been filed using NETFILE by clicking on the ReFILE button to the right of the return you want to change. This TurboTax FAQ has more information on how to ReFILE your return: I've filed my tax return. Can I still make changes?
Please wait until you have received your Notice of Assessment before making any changes to your tax return.
This Canada Revenue Agency (CRA) website has more information on what you can and can’t change with ReFILE: What does ReFILE exclude?