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 Question Thank you! Oops! Related Content Understanding the SECURE Act 2.0 A timeline covering a few of the major provisions of the SECURE Act 2.0. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Managing an Inheritance A windfall from a loved one can be both rewarding and complicated.