By default the oldest invoice will be paid first by Filopto. If you wish to pay a specific invoice you can. To view the invoices for payment click on the "X Invoice will be Paid" button to view the invoices on the payment screen. The value of X will be replaced with the number of invoice that will be paid. Pay a different Invoice
This screen allows you to assigned the amount of the payment to the specific invoices you wish. Place a check mark in the Pay column and the amount you want to pay in the Amount Applied Column.