Hello there, @AaronEME.

I'll gladly share updates about the delivery issue when sending invoices in QuickBooks Online (QBO) so you can manage your sales transactions accordingly.

Previously mentioned INVs (INV-70915 or INV-71760) were already tagged as closed and resolved. However, since other users, like you, still encounter the issue, we've decided to open a new one (INV-81436) to track the number of affected accounts.

In keeping with this, I'd recommend contacting our Customer Care team. They can add your account to the list of affected users. This ensures you're in the loop about the investigation's status and its fix. To do this, here's how:

1. Sign in to your QBO company.
2. Go to the Help (?) menu.
3. Select the Search tab.
4. Click the Contact Us button.
5. Enter a brief description of your concern in the What can we help you with? field.
6. Select Continue.
7. Choose the Chat with us option to connect with our experts.

Once everything is all set, you may also want to check out one of our Help pages as your reference to guide you in managing your company's income and customers in QBO: Sales and customers help for QuickBooks Online. It includes topics about processing payments, managing sales transactions, and customising forms, to name a few.

We highly appreciate your patience regarding this matter. If there's anything else you need or you have other concerns about managing invoices and income transactions in QBO, I'm always ready to help. Take care, and I wish you continued success, @AaronEME.