The only reason to bring TurboTax in line with what your paid preparer did is to carry forward certain 2020 deferred amounts to 2021 tax return.
The amount of work to align 2020 is at least ( or more than , considering the difficulty you see) the amount of work to enter those amounts manually with TurboTax 2021.
If you did not have any carryforwards, it doesn't matter what you filed in 2020.
If you applied some refund to 2021 tax year, you can enter that yourself when you file.
