I've got your back, Gossmike. I'll share what's causing the issue and guide you through the solutions, so you can get back to sending out those invoices without a hitch.

Below are the factors and solutions to ensure those invoices land in their inboxes.

1. New Migration: If you've recently migrated data from QuickBooks Desktop to QuickBooks Online, reset your email address by navigating to the Account and settings section in QuickBooks.
2. Spam/Junk Mail: Your invoices might end up in your customers' junk or spam folders. Ask them to check these folders and, if necessary, clear and re-enter your email address.
3. Email Server Allow list: QuickBooks Online email server hostnames and IP addresses might not be included in your outgoing mail server allow list. If that's the case, please contact an IT expert to add these to the allow list.

For more detailed steps, refer to this article: Troubleshoot if customers aren't receiving emails from QuickBooks Online.

Furthermore, ensure to select the correct invoice template before sending it out.

In the future, if you're looking to add a personal touch or specific details to your sales forms, this resource will be a great help: Customize invoices, estimates, and sales receipts in QuickBooks Online.

It'll guide you on how to tweak your invoices and sales documents to suit your preferences perfectly.

If you have any more questions or worries about making sure your invoices show the right template info, just let me know. I'm here to help and make sure everything goes smoothly for you!