Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. 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 Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. The Basics of Medicare Learn all about Medicare basics in this informative and insightful article. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates.