Unbilled charges don't work for me. I don't use that feature. I have found a report that works. Transaction Detail by Account. That report is under "for my accountant". Customize the report by transaction type, customer, A/P paid, which would be unpaid. You do have to change the customer each time but it works.  I have this report saved which I use. The accounting method to run report has to be accrual or nothing shows up.Good luck!