@chubby_2003 -
any changes to the 2018 tax year had to be made by April 15, 2022, so that is over with
changes to 2019 tax year have to be made by July 15, 2023
changes to 2020 tax year have to me made by May 15, 2024
changes to 2021 tax year have to me made by April 15, 2025
and in each year, if you filed for an extention before the filing deadline, you have until Oct 15 in the years listed.
<<lso, if my wife got a refund and I had to pay when we MFS, will this all be automatically recalculated with a new refund amount taking both of our returns into account?>>
yes, it is effectively a 'do over'.
