can i claim undeclared physical tax credits from 2023 on my 2024 return

[TurboTaxSusan]

Do you mean a Physical Activity Tax Credit? If you are in a province that has one, you would need to adjust your 2023 return to add the credit. 

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

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