As Tax Day approaches, concerns about how taxes could shape retirement finances are growing, with new data suggesting anxiety is rising across all age groups, and is particularly among Generation X. A quarterly study from Allianz Life Insurance Company of North America, polling 1,005 respondents age 18+ in the contiguous U.S. last month, found 70 percent of Americans are concerned about taxes on their income in retirement, a slight increase from the previous quarter. A similar share said they