After you file


@Jim328 wrote:

According to the IRS.gov site, The Form 1040X IS available now (and amendments can be filed electronically for 2019 and 2020 returns).  When will Turbo Tax update their program to allow amendments to be filed?


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