https://turbotax.intuit.com/tax-tips/irs-tax-forms/video-guide-to-irs-form-w-2g-certain-gambling-win...
The form itself will have a number of boxes, but for purposes of preparing your tax return, boxes 1, 2 and 14 are the most important. Box 1 reports your taxable gambling winnings, box 2 reports the federal income taxes withheld and box 14 reports the amount of state income taxes withheld. You must report the amount in box 1, as well as your other gambling winnings not reported on a W-2G, on the "other income" line of your 1040.
