This new option will automatically apply a customer's defined payment discount (if any) if the discounted invoice amount is paid in full and, of course, it is being paid on time. If an invoice is eligible for a payment discount then the system will calculate the discounted invoice amount and hold onto that value internally (there really isn't any space available to show the discounted value).

 

If a payment in excess of the discounted value is applied to the invoice then a warning will appear advising you that the invoice is eligible for a discount and will advise what that amount is. You can either edit the amount or accept the "over payment" amount "as is".

 

Overpaying the discounted amount will disable the automatic payment discount feature for that invoice. If it is disabled you can then manually discount the unpaid balance.