I can see the urgency of getting this issue fixed so you can get the Recurring invoice reminders feature working again, TBBFinance.

The issue about "Recurring Invoice Reminders aren't Updating" is still ongoing or under review. Since you already contacted our support and were listed as one of the affected users, you'll receive an email once the issue has been resolved.

Moreover, you can check out this article if you need to process payments by credit card, debit, PayPal, or ACH bank transfer: Receive payments directly in QuickBooks.

For additional QuickBooks concerns, please feel free to comment below. I'll get back to help you in any way I can.