Welcome to the Community, sim-pumbing.

You can remove the Account summary shown on your emailed invoice by going to your Custom form style settings. Let me guide you on how:

1. From the QuickBooks Online account click on the Settings icon.
2. Click on Custom form styles.
3. Click on the Edit link for your Standard template or the template used for your sales form.
4. Click on the Content tab.
5. Click on the pencil icon of the second box on the preview to the right.
6. Under Table untick the box for Show on the invoice for Account summary.
7. Click on Done.

Once done, attempt to send an invoice to your email or you can simply print or preview it to see how your invoice looks after making some edits to your settings.

You can also refer to this link to learn more about the account summary on an invoice: Add an account summary to an invoice in QuickBooks Online.

Post again in the Community if you have more questions about your sales form in QuickBooks Online. I'll be around to help you!