Is there a way to change the standard email greeting from “Hey customer” to a more appropriate greeting?

You'll be glad to know that you change the standard email greeting for your invoices, j4intn.

QuickBooks Self-Employed allows you to customize invoices right on the form itself. And, I'm happy to provide the steps:

1. Sign in to QuickBooks Self-Employed in a web browser.
2. Select Invoices from the menu, then click Create invoice. 
3. Click Customize.
   
4. Select the Email ▼ section to customize the message your customers see with their invoice.
   
5. Enter other details to complete the invoice.

You can also refer to this page: Create invoices in QuickBooks Self-Employed to learn how to send invoices to your customers.

Stay in touch with me if there's anything else you need with QuickBooks. I'm always around to help.

When I send invoices via the quickbooks online app, the initial part of the greeting is not showing.

"Dear [name],"

This part is not appearing. When I send the invoice via laptop, it appears ok. What is the problem? I just updated my app, but it is still the same.