By Pat Southern. Last updated 2011-03-29. Of the many men who led Rome, only a handful can truly be said to have profoundly and fundamentally shaped the empire's structure and direction. This gallery introduces six of the most important Roman emperors.
Tax Liability. The amount of total tax due the IRS after any credits and before taking into account any advance payments (withholding, estimated payments, etc.) made by the taxpayer.
For example, if a taxpayer earns $50,000 in taxable income and pays $6,000 in taxes, the tax rate would be 12 percent, because the tax liability of $6,000 divided by taxable income of $50,000 equals 0.12, or 12 percent, the individual's average tax rate.