After you file


@mwfriederichs wrote:

Well?  It's 3/25/21.  Where's the 2020  Turbo Tax amendment software update?  STILL WAITING. GET TYOUR ACT TOGETHER INTUIT. 


The date was changed to 03/26.

 

The IRS Form 1040-X for amending a 2020 tax return is scheduled to be available on 03/26/2021 (subject to change)