Allow me to provide with some information on how you can include classes and sub-classes in generating your reports.
With QuickBooks Desktop, you have the ability to customize and filter your reports by class and sub-class.
Here's how to view your PL report by sub-class:
That should do it! Please don't hesitate to click the Reply button if you have other questions about customizing your reports in QuickBooks Desktop. I'm always here to help.