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 Message Thank you! Oops! Related Content Exploring the Federal Student Grant Program In this article, explore the benefits of the Federal Student Grant Program. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. SECURE Act 2.0: An Overview The second iteration of the SECURE Act brings forward several changes to the world of retirement.