Your patience and persistence reflect how important this functionality is for your business operations, rvine. We recognize the inconvenience this experience has been for you. Rest assured, your concern is being addressed with utmost urgency.
Please know that we're forwarding your case to our Next Level Help team. They'll review your comments in the Community as well as your recent cases. You can anticipate communication from an expert within the next 1-2 business days regarding the next steps.
In case you'll be needing references on how to automatically or manually send reminders to customers when your invoices are, or soon to be, overdue, you can check oout this article: Send invoice reminders in QuickBooks Online.
We appreciate your patience regarding this matter. Don't hesitate to get back to us here in the Community for any other issues you may have. We'll make sure to provide the help you deserve.