Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content The Wild West of Data Theft Learn about cyber liability insurance in this entertaining video. Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program. Finding the Balance The sandwich generation faces unique challenges. For many, meeting needs is a matter of finding a balance.