You can enter under
Wages & Income
Less Common Income
Prizes, Awards, and gambling Winnings START
"Did you win money or other prizes?" YES
"Did you receive a W-2G?" NO
"Did you win any other prizes or awards that didn't come from gambling?" YES
Enter the value of the trip
I suggest you contact Sandals for the value of the trip and also to verify if they are sending you Form 1099-MISC reporting the prize value.
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