Hopefully, if one of us is ever lucky enough to win a big lottery jackpot, we won’t care about how much of it we have to “share” with Uncle Sam as taxes. But winning any immense lottery jackpot, especially some of the recent Powerball or Mega-Million grand prizes, is likely to result in a considerable share for the Department of the Treasury. How much in tax would the IRS receive from a $500 million lotto winner?