Limitations

(1) Except as provided in this section, section 29-2-208 (2)(a)(III), and section 29-2-302 (5)(b), and unless such time is extended by waiver, the amount of any tax or of any charge on oil and gas production, and the penalty and interest applicable to the tax or charge, shall be assessed within three years after the return was filed, whether or not such return was filed on or after the date prescribed, and no assessment shall be made or credit taken and no notice of lien shall be filed, nor distraint warrant issued, nor suit for collection instituted, nor any other action to collect the same commenced after the expiration of such period; except that a written proposed adjustment of the tax liability by the department issued prior to the expiration of such period shall extend the limitation of this subsection (1) for one year after a final determination or assessment is made. No lien shall continue after the three-year period provided for in this subsection (1), except for taxes assessed before the expiration of such period, notice of lien with respect to which has been filed prior to the expiration of such period, and except for taxes on which written notice of any proposed adjustment of the tax liability has been sent to the taxpayer during such three-year period, in which case the lien shall continue for one year only after the expiration of such period or after the issuance of a final determination or assessment based on the proposed adjustment issued prior to the expiration of the three-year period. This subsection (1) does not apply to income tax or to any tax imposed under article 23.5 of this title 39.

(2) In the case of an income tax imposed by article 22 of this title 39, unless such time is extended by waiver and except as provided in subsection (2.5) of this section, section 39-22-601 (6)(e), and section 39-22-601.5, the assessment of any tax, penalties, and interest shall be made within one year after the expiration of the time provided for assessing a deficiency in federal income tax or changing the reported federal taxable income of a partnership, limited liability company, or fiduciary; except that a written proposed adjustment of the tax liability by the department must extend the limitation of this subsection (2) for one year after a final determination or assessment is made. An assessment of income taxes having been made according to law must be good and valid and collection thereof may be enforced at any time within six years from the date of said assessment.

(2.5) Any limitations applicable to taxes, penalties, interest, fines, or charges within the scope of this article 21, as set forth in section 39-21-102, are suspended: