Imposition of cost of collection fee after amnesty period expires.

(a) In addition to all other penalties provided under this chapter or any other law, the commissioner may by regulation impose after the expiration of the tax amnesty period a cost of collection fee of 20 percent of any deficiency assessed for any taxable period ending or transactions occurring after December 31, 1990. This fee shall be in addition to all other applicable penalties, fees, or costs. The commissioner shall have the right to waive any collection fee when it is demonstrated that any deficiency of the taxpayer was not due to negligence, intentional disregard of administrative rules and regulations, or fraud.