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 Medicare Advantage 101 Overview of Medicare Advantage, what’s in them, special rules, and more. Understanding Equity Compensation Net Unrealized Appreciation and how it affects tax responsibilities. How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits.