Good day, MichaelO86.

You can set up a new payment term in QuickBooks Online. Let me show you how!

1. Go to the Gear icon and select All lists.
2. Click Terms, then New.
3. Select Due by certain day of the month. 
4. Enter which day of the month and the total days. Click Save.

I've added these links for more details:

• Enter and pay bills
• How to delete a bill

Post again here if you need anything else. Stay safe!