15-31-113. Gross income and net income. (1) The term "gross income" means all income recognized in determining the corporation's gross income for federal income tax purposes and:

(a) including:

(i) interest exempt from federal income tax and exempt-interest dividends as defined in section 852(b)(5) of the Internal Revenue Code of 1986, as that section may be amended or renumbered;

(ii) the portion of gain from a liquidation of the reporting corporation not recognized for federal corporate income tax purposes pursuant to sections 331 through 337 of the Internal Revenue Code, as those sections may be amended or renumbered, attributable to stockholders, either individual or corporate, not subject to Montana income or corporate income tax under Title 15, chapter 30 or chapter 31, as appropriate, on the gain passing through to the stockholders pursuant to federal law; and

(b) excluding gain recognized for federal tax purposes as a shareholder of a liquidating corporation pursuant to sections 331 through 337 of the Internal Revenue Code, as those sections may be amended or renumbered, when the gain is required to be recognized by the liquidating corporation pursuant to subsection (1)(a)(ii) of this section.

(2) The term "net income" means the gross income of the corporation less the deductions set forth in 15-31-114.

(3) A corporation is not exempt from the corporate income tax unless specifically provided for under 15-31-101(3) or 15-31-102. Any corporation not subject to or liable for federal income tax but not exempt from the corporate income tax under 15-31-101(3) or 15-31-102 shall compute gross income for corporate income tax purposes in the same manner as a corporation that is subject to or liable for federal income tax according to the provisions for determining gross income in the federal Internal Revenue Code in effect for the taxable year.