Can I change payment terms to be end of month plus 14 days, and end of month plus 30 days? I just need to apply these to specific customers.

Hello there olfoods,

In QuickBooks Online we can only select either Due by a certain day of the month or Due the next month if issued within. You can set up a new payment term in QuickBooks Online. Let me show you how.

1. Click on the Gear icon and select All Lists.
2. Click on Terms, then New.
3. Click on Due by a certain day of the month. 
4. Enter which day of the month and the total days. 
5. Click Save.

Post again if you have more questions about QuickBooks Online. I'll be around to help you!