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 Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors. Helpful Retirement Strategies for Women Learn how to address the challenges that women face when planning for retirement. When to Self-Insure Choosing to bear the financial burden of an adverse event is called self-insuring. Do you know what that entails?