Question of emails content

I know how beneficial being able to change the default email template for payment receipts. I can share some clarification about this feature in QuickBooks Online (QBO), shadeo.

The email template for payment receipt is a default setup in QuickBooks Online (QBO). The option to change the default email for customer payments is currently unavailable. We have to manually edit its body message before sending it to your customers. Let me guide you on how: 

1. Go to the Plus icon.
2. Select Receive Payments.
3. On the receive payment window, Select the Customer and the Invoice.
4. Click Save and send.
5. Then, update the Body of the email. Click Send and close.

For reference on how to customize templates for sales transactions, you can read through this guide: How to customize invoices, estimates, and sales receipts.

I'm adding this article here on how to personalize and add specific info to your sales forms: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Please let me know if you have more questions about emailing payment receipts in QuickBooks. I'm always available here in the Community.