Does the U.S.(Corporate/Federal) Government have legislative, i.e. taxing jurisdiction, inside the fifty states? Can the federal government tax the income of ordinary Americans?

Please provide the source for your answer.

(answerpool.com)

'...When the Constitution was adopted in 1789, the Founding Fathers recognized that no government could function if it relied entirely on other governments for its resources, thus the Federal Government was granted the authority to raise taxes. The Constitution endowed the Congress with the power to "…lay and collect taxes, duties, imposts, and excises, pay the Debts and provide for the common Defense and general Welfare of the United States." Ever on guard against the power of the central government to eclipse that of the states, the collection of the taxes was left as the responsibility of the State governments...' www.treas.gov

'The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.' (The Sixteenth Amendment to the US Constitution) caselaw.lp.findlaw.com

'The 16th Amendment of the Constitution, ratified in 1913, gives Congress the power to "lay and collect taxes on incomes."

Tax protesters have been arguing that the income tax is illegal ever since, according to the Internal Revenue Service, by "stringing together unrelated ideas plucked from widely conflicting court rulings, dictionary definitions, government regulations and other sources."

These are a few of the arguments and the government's answer, from the IRS Web site...' 16th Amendment OKs tax on income

Answerpool on the ratification of the 16th Amendment.