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! Test Your Investment Knowledge! How much do you know about investing? Take our quiz and find out instantly. First Name Last Name Email Address Thank you! Oops! 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. Do You Owe The AMT? If you want to avoid potential surprises at tax time, it may make sense to know where you stand when it comes to the AMT. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.