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 How Boomers and Millennials Differ The YOLO Economy is a focus on experiences over material possessions, prompting Boomers to consider a similar mindset. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government.