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 What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money. You May Need to Make Estimated Tax Payments If… Have income that isn’t subject to tax withholding? Or insufficient withholdings? You may have to pay estimated taxes. Tax Rules When Selling Your Home The tax rules governing profits you realize from the sale of your home have changed in recent years.