Is it possible to transfer the 'Investment Income > Stocks' from one return into another

Greetings! My son started trading in 2022 for the first time. I claim him as a dependent but will file a separate return for him with all his stock trades.

For convenience, I took a copy of my own 2022 return (with my wife, myself, and my son's info) and deleted my wife's and my information. I kept my son's info and added his stock trades (well over 100 entries).

 

QUESTION: Is it possible to delete the 2021 (side-by-side) info that transferred from my own return since it has nothing to do with my son's 2022 return?

 

QUESTION 2: Is it possible to transfer his stock trades into a new return so that I don't have to re-enter them?

 

THANKS for your help!

Peixes