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. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Good Health is Good Business Good employee health can be great for the company’s bottom line. Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.