I see that you're experiencing the same issue as the original poster regarding paid invoices still sending customer reminders, @Nextlevelhvac. I recommend contacting our QuickBooks Live Support team for a prompt review of your account and assistance in resolving this.

Here's how to contact them through your QuickBooks Online account:

1. Click (?) Help on the upper right.
2. Go to the Search tab and hit Contact Us.
3. Choose Ask about something else.
4. Enter your concern and then click Continue.
5. Choose from these options: Chat with us, Schedule an appointment, and Have us call you.

Please don't hesitate to comment if you need more help.