I have to amend a 1120-s for tax year 2020 and 2021. The original 2021 return had beginning year balance sheet balances from the original 2020 return. I now need the amended 2021 return to show the beginning year balance sheet balances from the amended 2020 return. Is there a way to update this so I can use the same 2021 file that was previously filed so I can e-file the amended return? Thanks in advance.