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 Yours, Mine, and Ours: Estate Strategies for Second Marriage Second marriages are a trigger event to revisit any existing estate strategies. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return. Succeeding at Business Succession There are a number of reasons for business owners to consider a business succession plan sooner rather than later.