It's nice to have you here on the Community page, @petervrooney.
I knew a few steps to remove the invoice details when emailing invoices in QuickBooks Online (QBO). I'm here to help share and guide you on how.
To exclude the invoice details when emailing invoices, you may need to set up your account and settings to show a short summary in email.
- Click on the Gear icon.
- Select Account and Settings.
- Click on Sales at the left pane.
- Go to the online delivery section.
- Click on Show short summary in email.
- Click Save.
- Click on Done.
You can see attached screenshots for additional reference.
You can also check this article for your reference in the future: Use e-Invoice.
Stay posted if you have any other QuickBooks or invoices questions, I'll be always here to help you. Have a great day ahead!