What does FED-SO mean on a pay stub?

FED-SO on a pay stub typically refers to "Federal Social Security," indicating the amount deducted for Social Security taxes. This deduction is part of the Federal Insurance Contributions Act (FICA), which funds Social Security and Medicare programs. The amount deducted contributes to future benefits you may receive upon retirement or in case of disability. If you have questions about the specific amount or calculation, it's advisable to consult your employer's payroll department.