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 Can I Refinance My Mortgage? This calculator can help determine whether it makes sense to refinance your mortgage. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return. Errors and Omissions Insurance E&O insurance is specifically designed to protect you, or your company, from the risk of a client’s dissatisfaction.