How do I set up my account to send automatic late notices for invoices?

Welcome to the Community, @aaronkyle.

Setting up reminders is an easy way to gently remind customers about invoice due dates. You can set up automatic reminders that go out a few days before or after the due date. 

Here's how:
 

1. Click the Gear icon and select Account and settings.
2. Select the Sales tab, then, in the Reminders, select Edit.
3. Toggle on Automatic invoice reminders.
4. Select the dropdown for Reminder 1, and turn on the toggle switch.
5. From the dropdown fields, select days, and before or after to tell QuickBooks when to send the reminder.
6. You can create second and third reminders as needed.
7. In the Email message field, clear the message text and craft your own. Or you can use the default message.
8. Hit Save. 

QuickBooks will automatically send reminders for invoices that meet your criteria. You can schedule and send email reminders up to 90 days before or after the invoice due date. 

Additionally, please note that QuickBooks sends reminders for invoices that have the Customer Email field filled out even if the invoice wasn't initially sent by email to the customer.

You may visit this article to learn more about recording invoice payments to help you balance your accounts in QuickBooks: Record invoice payments in QuickBooks Online

 If you have any further questions regarding setting up reminders in QBO, please don't hesitate to ask. Have a good one!