1. Find the unpaid invoice you want to pay under Bill Pay. Then click the Pay now button:
The invoice will now be paid today, or on the next banking day if the payment was initiated outside your bank's opening hours (for example in the evening or on a weekend or public holiday).
Once you have clicked Pay now on an invoice, the activity log on the invoice's Activity tab will clearly show that the payment was initiated and paid before its original due date.
You can also change an invoice's due date if you don't want to pay the invoice right away, but at a different time than its original due date. This will also update the invoice's due date in any integration.
Read more about how to change an invoice's due date here.