I just found out that I can claim half my rent, but I just filed my return. Can I go back to change it?

[TurboTaxSusan]

Yes. You can use ReFile in TurboTax or you can use the Canada Revenue Agency (CRA)’s My Account service to add the credit. This TurboTax FAQ has more information on changing a filed return: I've filed my tax return. Can I still make changes?