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 SECURE Act 2.0: An Overview The second iteration of the SECURE Act brings forward several changes to the world of retirement. Please Leave Home Without It Concerns over identity theft continue to grow, especially with data breaches at major companies and financial institutions. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit.