An old joke says "Nothing is more certain than death and taxes," and the taxes most people have in mind are income taxes. While there are other prominent taxes, such as the sales tax or the payroll FICA tax, when people grumble about their taxes or politicians vow tax cuts, they almost always have the Federal Income Tax in mind. This system of progressive and direct taxation and its poorly understood set of exemptions and deductions is easily the most prominent in America.
eHow Article: About Federal Income Taxes
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