Investments You’ve made investments your whole life. Work with us to help make the most of them. Related Content How Income Taxes Work A quick look at how federal income taxes work. The Financial Literacy Crisis Many Americans are operating their personal finances with only the barest minimum of knowledge. What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA.