Amend 2021 return

Hello all,

 

I used TurboTax CD/Download software 2021 to efile my 2021 Tax. Now, I would like to amend it. Do I need to buy Turbo 2021 again to amend it? I have tried to open my 2021 tax file (mytax.tax2021), but don't see any option to amend.

 

Thanks,