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 Question Thank you! Oops! Related Content Does Your Portfolio Fit Your Retirement Lifestyle? Lifestyle considerations in creating your retirement portfolio. Roth IRA for Kids Learn about the benefits and requirements of opening a Roth IRA for kids. Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors.