if you are not a professional gambler then gambling losses, not to exceed gambling winnings in the same year, are deductible on Schedule A. they only benefit you if your total itemized deductions exceed your standard deduction. there is no carryover for excess gambling losses
To enter the W-2G or other documents For your Gambling winnings--Go to Federal>Wages & Income>Less Common Income>Gambling Winnings
You can enter your winnings, and then keep clicking through the interview to enter gambling losses.
Gambling winnings are taxable income. Losses are an itemized deduction. If you do not have enough itemized deductions to exceed your standard deduction, your losses will have no effect.
2020 Standard Deduction Amounts
Single $12,400 (+ $1650 65 or older)
Married Filing Separate $12,400 (+ $1300 if 65 or older)
Married Filing Jointly $24,800 (+ $1300 for each spouse 65 or older)
Head of Household $18,650 (+ $1650 for 65 or older)