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 Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver. Retirement Accounts When You Change Your Job This video discusses issues related to your retirement accounts when you move on from your job. Succeeding at Business Succession There are a number of reasons for business owners to consider a business succession plan sooner rather than later.