I'm here to help you run the Profit & Loss by Class report including the payroll expenses, Iftikhar

Beforehand, I would like to commend you for being hardworking in achieving your goal. 

Below are the steps to run the report you want to view together with the payroll expenses:

1. Route your cursor to Reports in the left panel.
2. In the search box type in Profit and Loss by Class.
3. In the right corner click Customize.
4. Edit the date range, and click the Filter dropdown. In the Distribution Account box, locate the Payroll Expenses or you can also include all types of payroll expenses you'll see.
5. Review everything in the customize section for necessary changes, and then click Run report.

Feel free to read these articles for additional references:

• Run reports by class
• Customize reports in QuickBooks Online

Get back to us here if you have other questions or concerns. I'm always here to help. Have a good day!