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 Question Thank you! Oops! Related Content Your Emergency Fund: How Much Is Enough? Having an emergency fund may help alleviate the stress and worry associated with a financial crisis. Insurance Needs Assessment: When You're Newly Married Marriage changes everything, including your insurance needs. Succeeding at Business Succession There are a number of reasons for business owners to consider a business succession plan sooner rather than later.