Hi there,

It's good you're taking advantage of the Class feature offered in QuickBooks Online. I'll be happy to share more info on this so you can continue doing what you enjoy. 

I can see how beneficial it would be to be able to view wage costs on the Profit and Loss report by Class. At this time, using classes on your timesheets is solely for automatically transferring data to your paycheques. Being able to view these wages on the P&L by Class would be a great idea and I encourage you to send feedback about this to our engineers. To send feedback, click on the Gear icon and look for Feedback. New product ideas and improvements are largely based on the feedback we get from users like you. 

Let me know if this info helps. Otherwise, feel free to leave a comment below.