Hello there, SAHSulloway. 

What vendor report that we are pulling up? For a detailed reporting of the transactions, we can use what my colleague suggested. 

We're unable to enter a class on the Pay Bills window since we base the class details from its bill. It's possible that we didn't enter a Class on the Bill that's why it didn't show up. We can further check on the bill and enter a class either per line item or as a transaction. Then, we can filter the report or refresh it if we're currently opening one. 

We can check out this article that will help us customize a report by class. We might want to Memorize the report we've customized so we don't have to add the filters and columns all over again.  

I'm here if you need anything else. Thanks!