39-22-108. Enforcement.

(a) Audits. There are no specific applicable provisions for audits for this chapter.

(b) Interest. Interest at an annual rate equal to the average prime interest as determined by the state treasurer during the preceding fiscal year, plus four percent (4%), shall be added to all delinquent taxes under this chapter. To determine the average prime interest rate, the state treasurer shall average the prime interest for at least seventy-five percent (75%) of the thirty (30) largest banks in the United States. The interest rate on delinquent taxes shall be adjusted on January 1 of each year following the year in which the taxes first became delinquent. In no instance shall the delinquent interest rate be less than twelve percent (12%) nor greater than eighteen percent (18%).

(c) Penalties. The following shall apply:

(i) If any person fails to make or file a return and remit the tax as required by W.S. 39-22-107, the department shall impose a penalty of five percent (5%) of the taxes due for each thirty (30) day period, or fraction thereof, elapsing between the due date of the return and the date filed, unless the person for good cause obtains from the department an extension of time for filing prior to the due date for filing. In the event of an extension, the person shall pay the interest due on delinquent payments set forth in subsection (b) of this section. In no event shall the total penalty imposed by this subsection exceed twenty-five percent (25%) of the tax due. The department, for good cause, may waive a penalty imposed for failure to file a return for any one (1) calendar year, provided that:

(A) The return was filed within five (5) business days following the due date, including an approved extension period; and

(B) The taxpayer requests the waiver in writing within fifteen (15) days after the return was filed, setting forth the reasons for the late filing.

(ii) If any part of a tax deficiency is due to the negligence or intentional disregard of rules and regulations there shall be added a penalty of five percent (5%) of the amount of the deficiency plus interest as provided by subsection (b) of this section. The taxes, penalty and interest shall be paid by the taxpayer within ten (10) days after receipt of notice and demand by the department;

(iii) Taxes due together with interest, penalties and costs shall be collectible by the department by appropriate judicial proceedings;

(iv) The department may credit or waive penalties imposed by this section as part of a settlement or for any other good cause.

(d) Liens. Any delinquent tax is a lien upon the property of any owner from and after the time the tax is due until the tax is paid. The tax lien shall have preference over all liens except any valid mortgage or other liens of record filed or recorded prior to the date the tax became due.

(e) Tax sales. There are no specific applicable provisions for tax sales for this chapter.