1407.1 Why is too much tax sometimes withheld?
If you work for more than one employer, you may not have to pay all the taxes deducted by the employers. This is because the tax is deducted on wages paid by each employer up to the maximum wages creditable for Social Security. The total deducted may be more than you owe. (Beginning with tax year 1994, there is no limit on Medicare wages.)
1407.2 How is Social Security tax calculated if too much was withheld?
Claim the excess as a credit against your income tax when you file your Federal income tax return. Your credit is the total Social Security that was deducted from your wages that year minus the taxes actually due.
Last Revised: Jul. 1, 2004