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 Consider Keeping Your Life Insurance When You Retire Reasons to retain your coverage into your retirement years. 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. Emotional vs. Strategic Decisions Information vs. instinct. Are your choices based on evidence of emotion?