(a) For purposes of this section, "trust" shall have the same meaning given to it in Section 40-18-1.
(b) Any trust which would be subject to tax under Chapter 18 but which also is a financial institution shall be taxed as a financial institution under this chapter, applying the applicable provisions of subsections (a), (b), (d), (e), (f), (h), and (i) of Section 40-18-25. Such a trust shall utilize the allocation and apportionment rules found in this chapter.
(c) If a person is treated as the owner of any portion of a trust pursuant to 26 U.S.C. §§ 671-679, relating to grantor trusts, and if such person is a financial institution, the person shall take into account the income, deductions, and credits of such trust as provided in 26 U.S.C. in computing its net income under this chapter. Such person also may deduct the administrative and other expenses of the portion of the trust which it is treated as owning.