I hate to have to say that Dwarn is a little correct. The Supreme Court struck down most Federal Tax laws prior to the 16th amendment. The 16th amendment was ratified under the auspice that only income from "federal privileged" would warrant a federal tax, this to close a loop hole in Pollock v. Farmers Loan & Trust, United States Supreme Court, 158 U.S. 601, 1895. However the Constitution and Bill of Rights are very specific in allowing the States to exercise taxation to support their functionality. Point being, if the Feds weren't taking it from us the states would.