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 Creative Ways to Motivate Your Employees Five creative (and inexpensive) ideas for motivating your employees. Retiree Health Care Coverage Overseas Retirees traveling abroad need to know that their health insurance travels with them. Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate.