First check your paycheck stubs to be sure no fed withholding was taken out each week, just in case its a W2 error.
If you didn't have any withheld, you have to pay the balance due on the tax return....you already got all your money IN your paycheck...had they withheld taxes, your take home pay each week would have been less.
Its extremely important to review your paycheck stubs for situations like this during the year, so it can be rectified prior to filing your taxes..
♪♫•*¨*•.¸¸♥Lisa♥ ¸¸.•*¨*•♫♪
