The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Related Content Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important. The ABCs of Zero Coupon Bonds Understanding some basic concepts may help you assess whether zero-coupon bonds have a place in your portfolio. Your Shifting Risk Tolerance Time and market performance may subtly and slowly imbalance your portfolio.