Thanks for the quick reply and in answer to your question:
Line 20 of form 1040-X is blank.
Columns "A" & "C" are the same.
I've been looking through personal accounts & at IRS.gov and can't find that any monies have been paid on 2021's return(s) . . .
. . . depressing I know so it looks like the $$ on the payment voucher is owed.
