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 Six Surprising Facts About Retirement Confidence This attention-grabbing infographic covers retirement topics you may not have considered. When to Self-Insure Choosing to bear the financial burden of an adverse event is called self-insuring. Do you know what that entails? Should You Ever Retire? A growing number of Americans are pushing back the age at which they plan to retire. Or deciding not to retire at all.