Hi there, Pwoolly.

I understand the urgency of having this feature added asap. We'll wait for the update from our Product Team. For now, you can manually edit the default message before sending it to your customer.

You can check the articles below  for additional information about managing invoices and categorising transactions in QBSE: 
 

• Set up your invoice preferences.
• Learn how to keep your transactions organized.

Don't hesitate to post again if you have other concerns. The Community forum is always open to help you.