Get your taxes done using TurboTax

You can enter those gambling losses separately from your winnings after you enter those gambling winnings on the subsequent screens.

After you fill out the W2G screen for the winnings you have to go though several other screens to get to the loss screen by following the steps below:

1. When you get the W2G Summary Screen, if you don't have any more W2G to add then hit DONE. 
2. On the next Any Other Gambling Winnings? Screen - Select No
   
3. Then you get to the Gambling Losses Screen to offset that 1099-MISC income.