Currently, the option to run a report for worker's comp is unavailable in QuickBooks. I can see how this option would be helpful for you and your business.
I'll take note of this as a suggestion. This way, I can help you improve your QuickBooks experience.
For now, you can run the Payroll Summary report as a workaround. This will show, payroll totals, including employee taxes and contributions. Note that the dates in this report are by paycheck dates only, not pay period dates.
Go to the Reports menu, then select Employees and Payroll.