multiple projects with creditory payments
I have a construction business and often have multiple projects for one customer. I wish i could group invoices for specific projects under one heading. I recently invoiced a project for $1500 and the customer paid me $2500 as they added more work that has not been completed or invoiced how would i apply the amount owed and give a credit for the balance on this particular project and not confuse the credit with the four other projects i have for this customer. some are bid and some are T&M