Nuveen Arizona Quality Municipal Income Fund's primary investment objective is current income exempt from both regular federal income taxes and Arizona individual income taxes; its secondary investment objective is the enhancement of portfolio value. The Fund invests in municipal securities that are exempt from federal and Arizona state income taxes. The Fund invests at least 80% of its managed assets in securities rated, at the time of investment, investment grade or, if they are unrated, are judged by the manager to be of comparable quality. The Fund may invest up to 20% of its managed assets in municipal securities rated below investment quality or judged by the manager to be of comparable quality, of which up to 10% of its managed assets may be rated below B-/B3 or of comparable quality. The Fund uses leverage.