Also, there is an annual maximum Social Security wage base. For 2020, it was $137,700. If you earned more than that, then that amount is still the limit of your Social Security wages, and any amount you earned over that amount is not subject to Social Security withholding.
Social Security wages represent income earned from working and may be different from your taxable wages. For example, if you make contributions at work to a 401(k), the contribution is subtracted from your taxable wages but it is still included in your Social Security wages, because you earned the income, even though it is not subject to income tax.
