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 When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. Making Your Tax Bracket Work Have you explored all your options when it comes to managing your taxable income?