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 Password Protection Strategies Simple steps may help you foil hackers and protect your privacy. Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Working With A Financial Professional A financial professional is an invaluable resource to help you untangle the complexities of whatever life throws at you.