The Facts About Income Tax Want to be Smarter With Your Money? Join our mailing list and get news and info to support your financial goals. First Name Last Name Email Address Thank you! Oops! Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Share | Related Content Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. Six Most Overlooked Tax Deductions Six overlooked tax deductions to help manage your tax bill. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.