MassLive – At least two of the companies looking to win one of Massachusetts’ first casino licenses say the state needs to change how it taxes winnings to avoid discouraging people from playing and cutting into the take for the state and the casinos. Las Vegas-based MGM and Wynn want the state to repeal a provision requiring gambling facilities to report and withhold 5 percent for state income tax on certain winnings over $600. They say casinos in surrounding states all use lower, federal standards for income tax withholding, making them more appealing to regular players, casual day trippers and...