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 Roth IRA for Kids Learn about the benefits and requirements of opening a Roth IRA for kids. The Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does. Retirement Questions That Have Nothing to Do With Money Things to consider before retirement.