Depending on the amount you win and the kind of wager you place, you may receive a Form W-2G reporting your winnings to both you and the IRS.
Generally, if you receiveR$600 or more in gambling winnings, the payer is required to issue you a Form W-2G. If you have won more thanR$5,000, the payer may be required to withhold 28% of the proceeds for Federal income tax.