History of Taxation of Social Security supported by Ronald Reagan 50% match Research Notes & Special Studies by the Historian's Office www.ssa.gov www.ssa.gov http://www.ssa.gov/history/taxationofbenefits.html https://www.ssa.gov/history/taxationofbenefits.html History of Taxation of Social Security Taxation of Social Security Benefits https://www.ssa.gov/history/taxationofbenefits.html http://www.ssa.gov/history/taxationofbenefits.html has estimated History of Taxation of Social Security amendment to the Social Security Act