Ok ... let's first get this straight. You use the TT 2019 program to file a 2019 return that is done in 2020. And you use the 2020 program to file a 2020 return that is done in 2021. Then the 2021 program completes a 2021 return in 2022. Next year (2023) you will use the 2022 program to complete the 2022 return.
So if you used the 2019 program to complete the 2019 return and it had a refund you applied to the 2020 return then it should show up on the 2020 return. The 2019 refund could NOT be applied to the 2021 return which could be your situation. If you put that the 2019 return was applied to the 2021 return then the IRS was correct to disallow it and bill you for the missing payment. Now it is also possible that the 2019 return was never filed or it was filed but the IRS "lost/misplaced" it in the system. Good news is that if you have a refund coming to you then there are no penalties for mailing in the return now. However the 2019 refund can no longer be applied to the 2020 return if it has already been filed and it cannot be applied to any other tax year.
