Farmers’ cooperative credit associations, organized under an Act of Congress known as the Farm Credit Act of 1933 (12 U.S.C.A. § 1131 et seq.), for the extension of agricultural credit to their members only, and operating without profit except to the extent that they pay dividends to members on stock purchased by the members in these associations, are classified for the purposes of the intangible personal property tax law as savings and loan associations; and the accounts of these farmers’ cooperative credit associations with their members are classified as intangible property. There is imposed upon each member of any such association an annual tax equal to two percent of the taxable portion of the dividends declared and paid by the association, in the preceding year, on the stock of the association held by any member, which shall be the annual yield from the account. The taxable portion of these dividends shall be that proportion thereof equal to the proportion of the gross income of the association, for the dividend year, derived from notes and mortgages to which the association holds legal title, to its entire gross income. The association shall compute, withhold, and pay to the director of revenue, on or before the fifteenth day of April of each year, the amounts of all taxes imposed hereby upon the members of the association, this payment to be made in one remittance; and the association at its option may absorb these taxes without charging the same to the accounts of the individual members. This tax shall be exclusive, and in lieu of all other taxes upon these associations, their property, capital, or income, except ad valorem taxes upon real and tangible personal property, income, Social Security, and unemployment compensation taxes, and upon the accounts of these associations, except estate taxes.