If the Service Months field is blank, the deduction/benefit will not calculate.
System Administration Menu -> Payroll Controls -> Deduction and Benefit Codes Entry (KE0036) -> Select a code -> Select the Rates (KE0037) button
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Review the Deduction and Benefit Codes Entry for the setup, shown outlined below.
![undefined](https://cdn.livechat-static.com/api/file/kb/file/5399341/531d3a4761-1847f0774b5ae5a3f71f.png)
**Retirement/Months and Annual/Months options use the Service Months as part of the calculation.
Employee Maintenance (KE0001) -> Select the tab labeled Service Years (KE0078)
![undefined](https://cdn.livechat-static.com/api/file/kb/file/5399341/ad5263b6ff-209d5ba3313a8cd71df3.png)
Then review the Employee Service Years screen (KE0078) for the Service Months setup.
![undefined](https://cdn.livechat-static.com/api/file/kb/file/5399341/9aa4393afe-b8a470964870476e57be.png)