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 Roth IRA for Kids Learn about the benefits and requirements of opening a Roth IRA for kids. Long-Term-Care Needs Determine your potential long-term care needs and how long your current assets might last. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money.