For all tax years beginning after December 31, 1981, taxable income and adjusted gross income shall be adjusted to arrive at Oklahoma taxable income and Oklahoma adjusted gross income as required by this section.
In any case where the apportionment of the three factors prescribed in this paragraph attributes to this state a portion of net income of the enterprise out of all appropriate proportion to the property owned and/or business transacted within this state, because of the fact that one or more of the factors so prescribed are not employed to any appreciable extent in furtherance of the enterprise; or because one or more factors not so prescribed are employed to a considerable extent in furtherance of the enterprise; or because of other reasons, the Tax Commission is empowered to permit, after a showing by taxpayer that an excessive portion of net income has been attributed to this state, or require, when in its judgment an insufficient portion of net income has been attributed to this state, the elimination, substitution, or use of additional factors, or reduction or increase in the weight of such prescribed factors. Provided, however, that any such variance from such prescribed factors which has the effect of increasing the portion of net income attributable to this state must not be inherently arbitrary, and application of the recomputed final apportionment to the net income of the enterprise must attribute to this state only a reasonable portion thereof.
For purposes of this paragraph:
Notwithstanding any other provisions of the Oklahoma Income Tax Act, Section 2351 et seq. of this title, or of the Internal Revenue Code to the contrary, this subsection shall control calculation of depreciation of assets placed into service after December 31, 1981, and before January 1, 1983.
For assets placed in service and held by a corporation in which the Accelerated Cost Recovery System was previously disallowed, an adjustment to taxable income is required in the first taxable year beginning after December 31, 1982, to reconcile the basis of such assets to the basis allowed in the Internal Revenue Code. The purpose of this adjustment is to equalize the basis and allowance for depreciation accounts between that reported to the Internal Revenue Service and that reported to this state.
Provided, for taxable years beginning after December 31, 1999, amounts included in the calculation of federal adjusted gross income pursuant to the conversion of a traditional individual retirement account to a Roth individual retirement account shall be excluded from federal adjusted gross income for purposes of the income thresholds provided in this subparagraph.
Oklahoma adjusted gross income shall be increased by any amounts paid for motor vehicle excise taxes which were deducted as allowed by the Internal Revenue Code.
the time for filing a return and paying an income tax shall be and is hereby extended without incurring liability for interest or penalties, to the fifteenth day of the third month following the month in which:
Provided, that the Tax Commission may, in its discretion, grant any member of the Armed Forces of the United States an extension of time for filing of income tax returns and payment of income tax without incurring liabilities for interest or penalties. Such extension may be granted only when in the judgment of the Tax Commission a good cause exists therefor and may be for a period in excess of six (6) months. A record of every such extension granted, and the reason therefor, shall be kept.
may be deducted from the Oklahoma adjusted gross income.
The term shall not include a real estate investment trust that is intended to be regularly traded on an established securities market, and that satisfies the requirements of Section 856(a)(5) and (6) of the U.S. Internal Revenue Code by reason of Section 856(h)(2) of the Internal Revenue Code,
Okla. Stat. tit. 68, § 2358