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 Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. What is the Value of Your Business? Ascertaining the value of your business is important for a variety of reasons. A Look at Diversification Diversification is an investment principle designed to manage risk, but it can't prevent against a loss.