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 Stay Safe with a B.O.P. At Your Back Learn about the advantages of Business Owner Policies with this highly educational and fun animated video. Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors. A Look at Diversification Diversification is an investment principle designed to manage risk, but it can't prevent against a loss.