After you file

No problem with my 2020 return. I filed an amended return for last tax year, 2021. But the 2020 return did include the 8915E but the tax due was NOT spread over a three year period. It was paid in full with the 2020 return. However, on the 2021 return TTax used form 8915F to have me pay the tax I paid in full in 2020 over again over a three year period. I did file on time and paid the additional tax. Because TTax was so slow in providing the form 8915F and filing info I kinda panicked as I was right at the due date. Then, after further research I discovered because of the form 8915F I had overpaid and submitted the amended return. I am sure the IRS is having a ton of problems with this form 8915E/F issue plus TTax was so slow to incorporate it to their program so close to the due date.