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 Tax Deductions You Won't Believe Here are some examples of deductions from the IRS that were permitted and some that were, uh, too creative. The Sequence of Returns A look at how variable rates of return impact investors over time. How to Make the Tax Code Work for You When you take the time to learn more about how it works, you may be able to put the tax code to work for you.