If you have winnings of $five,000 or more, the organization could withhold up to 24% of the proceeds for federal revenue tax. https://www.zanichelli.it/login/zd-login.php?zanitTargetUrl=aHR0cHM6Ly95dHRwdHJhaW5pbmcuY29tLyVFQyVCNSU5QyVFQSVCMyVBMCVFQyU5RCU5OC0lRUIlQTklOTQlRUMlOUQlQjQlRUMlQTAlODAlRUMlODIlQUMlRUMlOUQlQjQlRUQlOEElQjgtJUVDJThBJTg4JUVDJTk2JUI0JUVCJUE3JUE4JUVDJTlEJUI0LSVFQiU4QiVCNSVFQyU5RCVCNCVFQiU4QiVBNC8/dG91cj1abVU3JmNhbXBhaWduPXVlWWxYJnRyYWNrPWRlZmF1bHQ