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 Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. How to Conquer the World - 5 Financial Strategies for Savvy Learn more about women taking control of their finances with this infographic. Social Security: Maximizing Benefits There are other ways to maximize Social Security benefits, in addition to waiting to claim them.