You know of any program for invoices where you can say.. you have a client who owes you $8,000.. They paid $2000 up front. And want to pay $400/mo till its paid off, possibly pay more each payment when they have the money to pay it off sooner. Know any program that can do that? Like setup invoices from a master invoice. And once an invoice is paid , the amount is subtracted from the master invoice.