The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Tax Efficiency in Retirement What role would taxes play in your investment decisions? Comparing Mortgage Terms Estimate the total cost in today's dollars of various mortgage alternatives. Retirement Seen Through Your Eyes What's your vision of retirement?