Under irs 2014-7, the medicaid wages I get for working at home are not taxable. Where do I enter what tax I already paid in and reported on the W2?

Because I didn't get the form into the employer in time, I have some wages reported on my W-2. They will not re-issue the W2. I figured out how to enter this under uncommon income, but don't know where to enter the federal and state tax that was withheld. Am I able to get this back?