Hi, I am having a similar issue. I often convert estimates to invoices, and use those invoices to apply customer payments to. However, I also track time and materials and assign them as billable to the same customers because our employees log time by customer and I need to keep track of materials purchased for jobs so that I can compare what I estimated vs what actual costs were. This results in unbilled time and expenses that clog up a customer's account, and in order to clear them, I've been creating "dummy" invoices, to apply all the unbilled time and materials to. These invoices sit in Accounts Receivable and show up as overdue on the customer's account, because I've applied the payments to the invoices created from the estimates. How do I safely clear out these overdue invoices in Accounts Receivable without deleting the time and materials entries that I need for accurate book keeping?