We need to set up an employee with a pay rate of 133% of their normal pay

Hi ty-propoint-net-,

Thanks for posting in the Community! Let me walk you through how to adjust the rate and penalty loading on pay categories. 

1. Go to Payroll or Employees tab.
2. On Payroll Settings, select Pay Categories.
3. Click on the pay category you'd like to adjust the rate loading and penalty loading to expand the details of the pay category.
4. Apply the appropriate Rate Loading or Penalty Loading to the base and linked categories. 
5. Once done, click Save. 

For more detailed information, you can check on this article: Enter Penalty Rate of the Employee. 

Let me know if you have any other questions, we're here to help you. Have a nice day!