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 Tax Efficiency in Retirement What role would taxes play in your investment decisions? The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. A Penny Saved is Two Pennies Earned Here are some simple and inexpensive energy-saving tips that may help you save money.