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 Encore Careers: Push Your Boundaries Ready for retirement? Find out why many are considering encore careers and push your boundaries into something more, here. You May Need to Make Estimated Tax Payments If… Have income that isn’t subject to tax withholding? Or insufficient withholdings? You may have to pay estimated taxes. Consider These 3 Things Before Driving Off the Lot Here are 3 quick tips to keep in mind when buying or leasing your next vehicle.