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 Dreaming Up an Active Retirement When you retire, how will you treat your next chapter? Financially Savvy at Six Figures Help your clients with these practical steps to make the most of their six-figure income. A Penny Saved is Two Pennies Earned Here are some simple and inexpensive energy-saving tips that may help you save money.