Hi there, @finance69.

You can add the list of codes and rates in your payroll settings through the Tax Setup. Let me guide you on how to do it.

1. Go to the Gear icon.
2. Select Payroll settings.
3. Choose the Tax Setup tab
4. Select the state for Workers Compensation Tax Setup.
5. Click the Add Class and Subclass link.
6. In the Risk Classification Class and Subclasses then, enter the rate in the fields.
7. Hit OK once done.

You can check this article for more information on how to assign workers' compensation classes to your employees in QuickBooks: Assign a Workers' Comp Class to an employee.

If you have any more questions or concerns, please don't hesitate to reach back. Have a good one.