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 The Business Cycle Understanding the economy's cycles can help put current business conditions in better perspective. Life and Death of a Twenty Dollar Bill How long does a $20 bill last? Is Term Life Insurance for You? Term insurance is the simplest form of life insurance. Here's how it works.