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.
Corporate, financial institution and insurance company taxpayers that reasonably expect to have a liability of more than $800 for the tax year must make quarterly estimated payments and returns. Each payment must approximate the taxpayer's tax liability for the quarter or 25% of estimated annual liability.