KEY POINTS
  • The First State, which already had allowed multigame bets on professional football, will now let gamblers bet on single games for a variety of professional sports.
  • If you win more than $5,000 from gambling, you can generally expect the payer (i.e., the casino) to withhold 24 percent for taxes.

If you plan to head to Delaware on Tuesday to take advantage of its opening day for legalized sports betting, don't forget your winnings won't be all yours.

The IRS will want a piece of the action.