After you file

If your return has been accepted and you already paid your tax due, then go ahead and start your amended return if you want to.  Understand that it will be months before the IRS processes it.    They have a huge backlog of amended returns.

 

https://ttlc.intuit.com/community/tax-return/help/how-do-i-amend-my-2021-return/00/2544441

**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**