I've inherited a set of books that are rather messy. Summary shows thousands of dollars in very old unpaid bills. When I check through I can see the payments were made separately as 'other payment' and not allocated to any invoice and they show up on the unallocated payments report. The invoices were entered but the payment doesn't show as being made. How do I connect those payments with the bills? I'm hesitant to reverse payment and re-enter as they are from previous years where tax reporting has already been done and accounts reconciled. Is there a way to simply connect a payment to a bill?