Nuveen Arizona Quality Municipal Income Fund, formerly Nuveen Arizona Premium Income Municipal Fund, is a diversified, closed-end management investment company. The Fund's investment objective is to provide current income exempt from both regular federal and designated state income taxes by investing primarily in a portfolio of municipal obligations issued by state and local government authorities within a single state or certain United States territories. The Fund invests in municipal securities that are exempt from federal and Arizona state income taxes. The Fund invests approximately 80% of its managed assets in securities rated, at the time of investment, investment grade (Baa/BBB or better by Standard & Poor's Group (S&P), Moody's Investors Service, Inc. (Moody's), or Fitch, Inc. (Fitch)) or, if they are unrated, are judged by the manager to be of comparable quality. The Fund's investment advisor is Nuveen Fund Advisors, LLC.