If you have a Customer that wants to come in and make a payment for multiple invoices with one payment or pay an invoice that is dated in the future an Invoice, you would need to Take Payment On Account.
- Open the Contact
- Towards the upper right, select Actions then Take Payment on Account
- From there fill out the details on the Payment and finish the Transaction
- Selecting the 'Auto-Allocate to Invoices' will take the funds from the Transaction and allocate to the oldest unpaid Invoice and continue allocating to the newer invoices until there are no funds left