Income tax the discussion of taxation by the United States of foreign persons. Residents, however, are generally subject to income tax on all worldwide income. A very few countries (notably Singapore and Hong Kong) tax residents only on income earned in or remitted to the country. Residence is often defined for individuals as presence in the country for more than 183 days. Most countries base residence of entities on either place of organization or place of management and control. The United Kingdom has three levels of residence. Most systems define income subject to tax broadly for residents, but tax nonresidents only on
Income tax in the United States direct tax on the basis of the source of the income. The Amendment removed the need for the income tax to be apportioned among the states on the basis of population. Income taxes are required, however, to abide by the law of geographical uniformity. Some tax protesters and others opposed to income taxes cite what they contend is evidence that the Sixteenth Amendment was never properly ratified, based in large part on materials sold by William J. Benson. In December 2007, Benson's "Defense Reliance Package" containing his non-ratification argument which he offered for sale on the Internet, was ruled by