Get your taxes done using TurboTax

30 years in the business and I have yet to enter one single W-2G form in any tax program ... simply put the total winnings on the appropriate line with zero IRS issues. 

 

Now if you have any withholdings on any of the forms, to get that in the program you will either need to make one W-2g entry  OR  put that in the other tax situations section next to the estimated payments.