Go back to the section for entering your gambling winnings and losses. There is probably a misplaced decimal point or a comma entered.
To enter, edit or delete Gambling Winnings and Losses -
Click on Federal Taxes (Personal using Home and Business)
Click on Wages and Income (Personal Income using Home and Business)
Click on I'll choose what I work on (if shown)
Scroll down to Less Common Income
On Prizes, Awards, and Gambling Winnings, click the start or update button