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 Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. Get Paid for Going Green Those looking into environmentally minded home modifications may get a boost from Uncle Sam’s tax incentives. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.