Mont. Code Ann. § 15-72-110 — Returns -- Payment -- Authority Of Department

15-72-110 . Returns -- payment -- authority of department. (1) On or before the 30th day of the month following the end of the calendar quarter in which the tax imposed by this part is payable, a return, on a form provided by the department, and payment of the tax for the preceding calendar quarter must be filed with the department.
(2) Each person engaged in transmitting electricity in this state that is subject to the tax under this part shall file a return.
(3) (a) A person required to collect and pay to the department the tax imposed by this part shall keep records, render statements, make returns, and comply with the provisions of this part and the rules prescribed by the department. Each return or statement must include the information required by the rules of the department.
(b) For the purpose of determining compliance with the provisions of this part, the department is authorized to examine or cause to be examined any books, papers, records, or memoranda relevant to making a determination of the amount of tax due, whether the books, papers, records, or memoranda are the property of or in the possession of the person filing the return or another person. In determining compliance, the department may use statistical sampling and other sampling techniques consistent with generally accepted auditing standards. The department may also:
(i) require the attendance of a person having knowledge or information relevant to a return;
(ii) compel the production of books, papers, records, or memoranda by the person required to attend;
(iii) implement the provisions of 15-1-703 if the department determines that the collection of the tax is or may be jeopardized because of delay;
(iv) take testimony on matters material to the determination; and
(v) administer oaths or affirmations.
(4) Pursuant to rules established by the department, returns may be computer-generated and electronically filed.