Check the following
You see any error.
Did you use the Workers Compensation Wizard to set up your Workers
QuickBooks cannot accurately calculate your workers compensation premiums
unless you set up the Workers Compensation feature before you run your
payroll. If you did not do this, go to the Workers
Compensation Wizard and complete it now.
Set your workers compensation preferences
to exclude or include overtime premiums (as required by your workers
compensation carrier) and rerun the report.
Your experience modification rate is missing from the Exp. Mod. column
Check the Workers Comp List to find
out whether you set up your experience modification rate—and that you set it
to go in effect on the correct date.
You cannot set up your experience modification factor retroactively.
If you forgot to set it up, take the total in the WC Premium column and
multiply it by your experience modification factor to get your adjusted
workers compensation premium.
You can change the rate retroactively. The change does not affect individual paycheck transactions, however, it does update the following Workers Compensation reports: Workers Comp Summary, Workers Comp by Code and Employee, Workers Comp by Job Summary, and Workers Comp Detail.
If there is a difference between the totals on the reports and your liability totals (which are calculated based on paycheck data), you may have to make a manual adjustment.
What if my reports don't match my liabilities?
Workers Compensation overview