Do I have to create/incur another REP to amend just one state return for a client?
Not if you did the original state return.
So you're saying to just change the original to an amended return then?
Yes.
Sorta! Be sure to make a backup before starting.
https://proconnect.intuit.com/community/individual/help/generating-form-1040x-amended-u-s-individual...
