Getting started

Yes, you can. You can login to TurboTax Canada Online 2023 here: https://ww1.2023.ca.turbotaxonline.intuit.com/

But if you already filed a return in 2023, you have to adjust that one rather than starting a new one. This TurboTax Canada FAQ tells you how you can use ReFile: I've filed my tax return. Can I still make changes?

You can also make the adjustment using the Canada Revenue Agency’s (CRA) My Account service or you can print & mail a T1-ADJ T1 Adjustment Request.