Gambling winnings are fully taxable and you must report the income on your tax return or have any gambling winnings subject to federal income tax withholding. The amount of losses you deduct can't be more than the amount of gambling.
This article applies only to gambling winnings and losses for causal 300 times the amount of the wager; The winnings are subject to Federal.
Gambling winnings are deducted only after reaching a threshold level of profit. Instead, the federal government has set a 25 percent tax rate on minimum.