Yes! Mega Millions lottery tickets are offered for sale in 46 US states and territories. When you play Mega Millions online with theLotter from anywhere in the world, an official lottery ticket is bought locally on your behalf. A scan of your Mega Millions ticket will be available as part of theLotter’s See Your Ticket Service in time for the Tuesday or Friday night draw.
If you do find yourself at 11 p.m. ET Tuesday with the winning ticket in your hands, be prepared to keep quiet after that initial scream of joy to your spouse or other loved one, said certified public accountant Daniel Mahler of Gisler & Mahler in Bloomingdale, N.J. And sign your ticket; that establishes it as yours before you go to the nearest lottery office to claim your prize.
On May 18, 2013, the world's largest one-ticket jackpot, an annuity of approximately $590.5 million ($620 million today), was won by a Powerball ticket sold in Zephyrhills, Florida.[33] On June 5, Florida Lottery officials announced the winner: Gloria C. MacKenzie, 84, who purchased the "quick pick" ticket at a Publix supermarket.[34] MacKenzie chose the cash option of approximately $370.8 million, before Federal withholding; Florida does not have a state income tax.[34]
If you’re not using an official state lottery website, the retailer may not be licensed and therefore could have no connection to the state lottery programs. Last year, during the record-breaking $1.6 billion Powerball jackpot, Holyfield says Michigan’s lottery office fielded several calls from consumers who purchased tickets online, only to have the vendor shut down without notice.
Rules vary according to the applicable laws and regulations in the jurisdiction where the ticket is sold, and the winner's residence (e.g. if a New Jerseyan wins on a ticket bought near their workplace in Manhattan). Mega Millions winnings are exempt from state income tax in California; while Florida, New Hampshire, South Dakota, Tennessee, Texas, Washington state, and Wyoming do not have an income tax. On the other hand, some residents of New York City and Yonkers, New York pay three levels of income tax, as these cities levy income taxes.
The two different methods, both offer you, the player, the same user experience and the only difference is in the back end of how the online lottery ticket provider works. The two methods that online lottery sites use differ in one key way; They either have agents and employees all over the world that physically purchase tickets on behalf of clients or, the more recent phenomenon is when companies essentially take out an insurance policy on every ticket which is tied to the size of the jackpot. This is the difference between you playing the lottery online and betting on the lottery online*. In the latter option you are, de facto, not playing the US Powerball online but rather you are placing a bet with an insurance company on the outcome of the corresponding Powerball draw. 
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