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 | Related Content The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Five Most Overlooked Tax Deductions Five overlooked tax deductions to help manage your tax bill. Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax.