Classification of vehicles and mobile homes and assessment of license tax by department.

The department may, in accordance with the provisions of this chapter, determine the classification of, and the amount of license tax due on, any motor vehicle or mobile home required to be registered under the laws of this state and may, in accordance with the provisions of this chapter, fix, determine, and assess the amount of license tax and fees to be paid for registration or renewal of registration. A determination of the department, when certified in writing, is prima facie evidence of the validity, regularity, and propriety thereof and of the liability of the vehicle involved therein to the classification and tax so determined, fixed, and assessed. No such determination when made by the department may be disregarded or set aside in any court, except when clearly shown to be unwarranted in law or in fact.