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 Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money. Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax.