Locking information into an invoice or esimate

broofer

We have customers that use multiple service address's with one billing address. We do roofing repair and have contracts with community management companies. I can not bill multiple addresses at the same time because every time I bill a new one it changes all previous invoices. I also lose all record keeping since it does not lock into each one. We are using the ship to address as the site work is being done. It would also be nice to be able to change this to "location" instead of ship to.