Just circling back around here, I was able to solve my problem. I had a "filed" return, but I needed to remove the payment that was made, so that I could mark the return paid with 2 entries instead of one. (to match my banking transactions that actually happened.)
When viewing the return, the date of payment is a blue link, and you're given the option to "DELETE" the payment. That allowed me to create 2 new payments against the return, which then allowed me to match the banking transactions for the same 2 payments. Worked great.
It wasn't obvious to me that I needed to delete the existing payment in order to allow new payments to be added.
Thanks for everyones help!