I have some information to share with you concerning the ongoing issue, @OMOM, and I know this isn't a simple process for you.

 I appreciate the effort you've taken to resolve the matching problems in QuickBooks Online.

I see that a case has been opened in your name. Rest assured that the account has been added to the investigation, and you will be getting updates on how the problem is progressing.

Once everything is good on your end, see this guide if you want to personalize invoices in QBO: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Please let us know if you need anything else about banking, invoices, or QuickBooks in general. We'll make sure to respond as soon as we can. Take the best care!