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 average tax rate for returns with a positive liability went from 12.24 percent in 2008 to 11.06 percent in 2009. As the data below show, incomes reported by tax returns at the high end of the income spectrum fell from 2008 to 2009, as did their share of the nation's income and income taxes paid.