The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Share | Related Content Social Security: By the Numbers Here are five facts about Social Security that might surprise you. Should I Invest in Gold? Learning more about gold and its history may help you decide whether it has a place in your portfolio. Social Security: The Elephant in the Room Some people wonder if Social Security will remain financially sound enough to pay the benefits they are owed.