Hi @b_jones,

I appreciate your prompt reply and thank you for the details you included in your post.

The feature to assign a class to an entire bill transaction is available in QuickBooks Desktop (QBDT) Enterprise. You can consider upgrading to QBDT Enterprise if you need to have this feature available. 

Otherwise, you can assign the class you want to each line item on your bills. This way, the report you generate for this class will show the correct amounts. 

I'll leave this article with you: Filter, sort, or total reports by Class. It's a detailed guide on how you can customize reports in QBDT, in regards to classes. 

Feel free to drop a comment below if you have other questions about classes in QBDT. I'll handle them for you.