Supreme Court justices protest states' double taxation

USA Today: WASHINGTON — The Supreme Court came to a simple conclusion Wednesday about taxes: They're not always fair.

The justices reached that conclusion during oral arguments in a case testing Maryland's income tax system, which does not grant a full credit to residents who also pay income taxes in states where they work. If Maryland loses the case, it could threaten millions of dollars in tax revenue there and in several other states and localities.

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