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. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Smart Wedding Registry Ideas The start of marriage should be all love–not debt. How to Read Your Credit Report Solve a mystery while learning how important your credit report is with this story-driven interactive. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.