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 Separating the Signal From the Noise A good professional provides important guidance and insight through the years. Insurance Needs Assessment: When You're Young and Single Even if you’re young and single, you should still consider protecting yourself. Stop Wasting Money One way to find money is to examine your current spending habits and eliminate money wasters.