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 Question Thank you! Oops! Related Contents The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. How to Appeal Your Property Taxes For homeowners who think their property taxes are too high, there are ways to appeal. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.