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 Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return. Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax.