Credits and deductions

You can adjust your 2024 return to add the credit. You can login to TurboTax Do It Yourself (Online) 2024 here: https://ww1.2024.ca.turbotaxonline.intuit.com/

This TurboTax Canada FAQ tells you how you can adjust your return using ReFile: I've filed my tax return. Can I still make changes?

You don't have to pay back credits unless you applied for one that you were not eligible for.