Connect with and learn from others in the QuickBooks Community.
Thanks for reaching out to the Community, @michael139.
Turning off overdue invoices notification in QuickBooks Online (QBO) is pretty quick and easy. This can be done by going to the Account and Settings.
To learn more about how this feature works, consider checking out this article: Automate invoice reminders in QuickBooks Online.
I also add this article for more information about managing invoices in QBO: Learn how to create and send invoices.
Please know that I'm only a post away if you have any other issues or concerns. I'll be more than willing to help. Have a good one!