abrdn National Municipal Income Fund (the Fund is a diversified closed-end management investment company. The Fund's investment objective is to provide current income exempt from regular federal income tax, consistent with the preservation of capital by investing in municipal bonds. It invests at least 80% of its net assets in securities, the income from which is exempt from federal income taxes. It also seeks to invest up to 20% of its net assets in municipal bonds with an investment rating of Ba/BB or lower, or that are unrated but judged to be of comparable quality by the Fund's investment adviser. It invests in corporate revenue bonds, education revenue bonds, electric revenue bonds, healthcare revenue bonds, housing revenue bonds, lease revenue bonds, local general obligation bonds, pre-refunded/escrowed to maturity bonds, and special tax revenue bonds. The Fund’s investment manager is abrdn Inc.