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! Free Guide: Will Tax Reform Impact You? The new tax laws in 2018 could bring significant changes to your tax strategy. Download our free ebook, "5 Things You Need to Know About Tax Reform." First Name Last Name Email Address 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. “Dirty Dozen” Tax Scams to Watch For Every year the IRS releases its list of tax scams, spotlighting some ways that people try to separate you from your money. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.