Thanks for sharing more details about your concern, sjh43.
When emailing invoices in QuickBooks Desktop, there are lists of fields that you can add. I've added them below:
Once you've checked them, you can edit the template by going to the Preferences tab to select the available details you'd like to include.
Once you're ready, you can now email the invoices.
You can also use and customize form templates in QuickBooks Desktop. This helps you manage how they look and the information you'd like to include.
I suggest getting back on this thread if you'll need assistance in sending your forms. It's my pleasure to help you out again.