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 IRA Withdrawals that Escape the 10% Tax Penalty The list of IRA withdrawals that may be taken without incurring a 10% early penalty has grown. Best-Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return.