After you file

Sorry I didn't state my question correctly due to my ignorance.  So let me correct myself.

 

I claimed a section 1256 contracts loss carry back in my 2022 return.  How do I amend my 2021 return with this carry back from 2022?  (where do I enter this carry back loss from 2022 return?)

 

I use TurboTax Premier (desktop) version for both 2021 and 2022 returns.  Thanks