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 Disability Income This calculator estimates your chances of becoming disabled and your potential need for disability insurance. Traditional vs. Roth IRA One or the other? Perhaps both traditional and Roth IRAs can play a part in your retirement plans. Your Changing Definition of Risk in Retirement A change in your mindset during retirement may drive changes to your portfolio.