How to add a pre-tax retirement benefit
To add a pre-tax deduction, go to Payroll → Setup → Deduction/Benefit List; you will see options from which you may select your Deduction item. If there are no appropriate options listed, click the Add a New Deduction/Benefit From Template link.
Add a New Deduction/Benefit from Template
Once you have selected the item from the Add a New Deduction/Benefit from Template screen, it will be available to edit on the Deduction/Benefit List screen. Click the Edit button to the left of this new Deduction/Benefit and update any field to hone it to your needs.