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.
The result is a person's taxable income. Taxable income is the amount of income left over after subtracting these various types of deductions. Taxable income is the figure we use when calculating a person's federal income tax liability.