Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. 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 What is the Value of Your Business? Ascertaining the value of your business is important for a variety of reasons. What to Look for in Personal Finance Apps An increasing number have been developed to help individuals with their personal finances. SECURE Act 2.0: An Overview The second iteration of the SECURE Act brings forward several changes to the world of retirement.