Thanks for joining this thread, Steve.

I want to make sure you're able to send invoices with the correct format. For this, you need to check your setting

First, let's check your online invoice email settings and see what format is selected. Follow these steps in QuickBooks Online to check:

1. Click the Gear icon and choose Accounts and Settings.
2. Go to Sales then Online Delivery.
3. Under Additional email options for invoices, make sure it's not set to Plain Text. If it does, switch it to Online Invoice.
4. Don't forget to press Save and Done after.

Once done, try to CC the invoice to your email and see if the format is corrected. If you're still having  a recurring issue with this, I strongly recommend contacting our support to report this issue. Here's how to get our support team:

1. Go to the Help menu in QuickBooks, then choose the Search tab.
2. At the bottom click on Contact us.
   
3. Enter the keyword Banking, Account Management and Billing in the What can we help you with? box.
   
4. On the next screen, scroll down to How would you like to connect with us section.
5. Choose your contact option to initiate a discussion with a live agent.

You may refer to the following link for tutorials and articles about sales and customers: Topics about your company's income and customers.

Come back to this forum anytime if you have other online invoice questions. I'll be right here to assist you. Have a nice day!