To access your prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/
Start the 2023 online tax return by entering some personal information then click on Tax Home on the left side of the screen.
On the Tax Home webpage -
Scroll down to the section Your tax returns & documents. Click on the Year 2020 and Click on Amend (change) 2020 return
If you cannot access your prior online account, then use the Account Recovery procedure.
See this TurboTax support FAQ - https://ttlc.intuit.com/turbotax-support/en-us/help-article/security-risk/account-recovery-request-t...
