How winnings are reported to the IRS: Form W-2G. The payer must provide you with a Form W-2G if you win: $600 or more if the amount is at least 300 times the wager (the payer has the option to reduce the winnings by the wager)
Jackpots are almost always paid in cash unless you specify otherwise. Anyway once your processing is complete you are typically paid at the machine.
