It's my pleasure to walk you through editing the invoice template in the Custom form styles menu, mcoda1.
You can create attractive, professional-looking invoices in QuickBooks Online. To edit the email template for your invoices, create a new style or modify the existing ones according to your preference. I'll show you how.
Go to the Gear icon, then select Custom form styles (Take me there).
Choose the template you'd like to customize, then click Edit.
You can also tap New Style, then pick Invoice.
A new window will open where you can see the Design, Content, and Emails tabs. You can start tailoring the template on the Emails page.
Hit Done.
Additionally, we can do the same to your Salessettings to adjust the email message sent with sales forms. Follow the steps below:
Go to the Gear icon, then select Account and Settings (Take me there).
Click Sales on the left pane.
Scroll down to the Messages section to make changes.