Mont. Code Ann. § 15-72-111 — Examination Of Return -- Adjustments -- Delivery Of Notices And Demands

15-72-111 . Examination of return -- adjustments -- delivery of notices and demands. (1) If the department determines that the amount of tax due is different from the amount reported, the amount of tax computed on the basis of the examination conducted pursuant to 15-72-110 constitutes the tax to be paid.
(2) If the tax due exceeds the amount of tax reported as due on the taxpayer's return, the excess must be paid to the department within 30 days after notice of the amount and demand for payment is mailed or delivered to the person making the return unless the taxpayer files a timely objection as provided in 15-1-211 . If the amount of the tax found due by the department is less than that reported as due on the return and has been paid, the excess must be credited or, if no tax liability exists or is likely to exist, refunded to the person making the return.
(3) The notice and demand provided for in this section must contain a statement of the computation of the tax and interest and must be:
(a) sent by mail to the taxpayer at the address given in the taxpayer's return, if any, or to the taxpayer's last-known address; or
(b) served personally upon the taxpayer.
(4) A taxpayer filing an objection to the demand for payment is subject to and governed by the uniform tax review procedure provided in 15-1-211 .