Accessing the closed period is not an issue, deleting or changing JE's is an issue. Several JE's were created for prior periods in lieu of entering individual transactions when we switched to QBs in 2020. These JE's created a bill with a negative balance due. A negative bill in PAY BILLS can not be selected. Every suggestion made we have tried without solving the issue, so the negative bill will just sit in PAY BILLS. The vendor in question has a zero balance due and was made inactive, but still shows up on the aging report. Why do the aging reports show inactive vendors/customers at all?

Changing the JE will mess up that period (Nov 2019) and every period thereafter, so that is not an option. Verify & rebuild data shows no issues. I am an accountant and I've consulted other accountants. This is not an accounting issue, it's a QB's issue. JE's created a NEGATIVE BILL TO PAY, but a negative bill cannot be selected in the PAY BILLS WINDOW!   A lot of other users seem to have this same issue, so maybe QBs needs to research how and why this is happening at all. 

If anyone else has figured out how to clear this, please let me know!