THe dependent care credit adds my 2022 costs and 2023. I didn't use TurboTax in 2022. How do I add my 2022 costs?

Only the dependent care costs you incurred in 2023 can be entered on a 2023 tax return.

You cannot put childcare costs for 2022 on a 2023 tax return.   If you need to use childcare costs for 2022 it has to go on your 2022 return--which you can amend if you forgot to include the childcare expense last year.