Yes, you are required to report all income including gambling winnings.
However, you can deduct your gambling losses to the extent of gambling winnings if you itemize deductions (medical expenses, mortgage interest, property taxes, charitable giving ,ect)
To enter your gambling winnings and losses
Type in gambling losses in the search box, top right of your screen, then click the magnifying glass
Click the jump to gambling losses link in the search results.
Follow the onscreen instructions to enter
