Trying to amend my 2021 return

Looks as if the 2021 forms needed for amended returns are available for TurboTax Premier Mac (as of 3/1/2022).  When I click on the amendment option on the TurboTax main page, it seems I have to type in all my information again.  It doesn't know my name or personal details, or any of the other data from the return I need to amend.  All I need to do is add a 1099-DIV that I forgot, but none of my W-2s, 1099s, etc. are displayed.  It never asks about my already submitted 2021 return.  Do I have to reenter all my data again? Can someone help me?