Get your taxes done using TurboTax

I'm not sure if you already found the answer to the data in 25c, but I found the information on Form 8959 in my return.  I owed extra Medicare Tax, which was withheld by my employer so the amount shows up as part of Line 23 Other Taxes and 25c.  Took a while to figure it out though.  The forms could make this clearer.  Hope that helped.