I can share some information that can help you with edit the email template for your invoices, sierra.

You can edit the email that goes along with your invoices from the Preferences. You can customize email templates and use them to send messages from QuickBooks. 

Here are the steps to follow:

1. Go to the Edit menu and select Preferences.
2. Select the Send forms menu and then the Company Preferences tab.
3. From the Delivery Method Default dropdown menu, choose Email.
4. From the Email Templates drop-down menu, select Invoices. 
5. You can choose to Edit the current template or create a new one by clicking the Add Template button. 
6. On the Edit Email template window that appears, you can edit the subject and the body of your email. 
7. Click on Save once you're done.
    

Refer to the following article for more information about personalizing your emails to customers and vendors: Create custom email templates in QuickBooks Desktop. 

Once resolved, here's how you can manage and receive payments in QuickBooks Desktop: Record an invoice payment.

Let me know if you need further guidance editing the email template for your invoices. I'd be happy to assist you in any way possible. Keep safe, and enjoy the rest of the week!