After you file

On Mac "save as"  is Duplicate  You should have the 2021 tax file on your computer.   Don't try to transfer it from iCloud.     Use Finder to find it.  

 

No you don't need to transfer 2021 into 2022.  You can enter everything from scratch again.  Do you have any complicated items like Depreciation?  You can manually enter any carryovers like Capital Loss Carryover.