First you did not "pay" taxes on the winnings already ... there was taxes withheld just like your paycheck has taxes withheld to balance off the estimated taxes you will owe on the tax return. You will have to enter ALL of the winnings prior to the withholdings being taken out on the return. And if you kept records of any gambling losses then you may be able to deduct them on the Sch A if you can itemize deductions. Other than that there is nothing special to do on the return ... congrats on the winnings.
