Gambling winnings of 16k. PA Law imposes its income tax on nonresidents on all gambling and lottery winnings from PA sources, except prizes from playing the Pennsylvania State Lottery. Will I have to owe money or get a refund? Get every deduction you deserve TurboTax Deluxe searches more than tax deductions and credits so you get your maximum refund, guaranteed. In most cases, the casino will take 25 forn off your winnings for the IRS before even paying you. Depends on what the two states are.Find out what is considered gambling income and how much tax you have to pay If tax is withheld from your gambling winnings, you will be sent a Form W2-G. Any and all gambling winnings must be reported to the IRS. . If you don't have to fill out a tax form, don't worry about reporting. Also, don't go. File this form to report gambling winnings and any federal income tax withheld on those winnings. The requirements for reporting and.