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 Dreaming Up an Active Retirement When you retire, how will you treat your next chapter? Does Your Child Need to File an Income Tax Return? When your child has income, there’s a good chance that he or she will need to report it and pay taxes. SECURE Act 2.0: An Overview The second iteration of the SECURE Act brings forward several changes to the world of retirement.