Income tax in the United States dates. Some states permit related corporations to file combined or consolidated returns. Most states and localities imposing income tax require estimated payments where tax exceeds certain thresholds, and require withholding tax on payment of wages. Puerto Rico is treated as a separate taxing entity from the USA; its income tax rates are set independently, and only some residents there pay federal income taxes (though everyone must pay all other federal taxes). The unincorporated territories Guam, American Samoa, and the Virgin Islands also impose income tax separately, under a "mirror" tax law based on federal income tax law. Proposals have been
Income tax in the Netherlands employed and self-employed people there is an employment rebate. The wage withholding tax is a deduction of wages, social security benefits and pensions, as an advance payment for the income tax, paid through the employer, etc. See also . From 2006 there is a new national health insurance scheme ("zorgverzekering(swet)", "Zvw" ). The premium is partly income-dependent and paid as a tax supplement. It applies for the "contribution income" ("bijdrage-inkomen" ), which is part of box 1, including labor income, social security benefits, pensions, and life annuities (it does not include the "owner-occupied dwelling income"). It is withheld if the