Montana Title 15. Taxation § 15-31-142. Reports upon merger of corporations

If any corporation shall acquire, either directly, indirectly, or by merger or consolidation, the major portion of the actively employed assets of another corporation or of corporations doing any business in this state during any year or shall merge or consolidate another corporation, it shall within 30 days after such acquisition, merger, or consolidation file a report and include therein a statement showing its own and the consolidated entire net income of all such corporations for preceding calendar or fiscal years to the extent that all such income has not been used or included in measuring a corporation excise tax to this state. It shall, in any event, be liable for and pay all taxes that would have been due and payable by the corporation or corporations on or before the first day of January next succeeding had the corporation or corporations whose assets were acquired or which were merged or consolidated continued in business and as though there had been no interruption or change of the business thereof or discontinuance of the privilege of doing business. It shall also include in its own next annual return, in addition to its own entire net income, so much of the entire net income of corporations whose assets it acquired or which were merged or consolidated as shall not have been used or included in measuring a corporation excise tax to this state and shall be taxed upon such combined entire net income for the year to ensue.