Miss. Code Ann. § 27-35-513

If any company shall fail, or refuse, to make and file any statements required by law or any other statement demanded by the State Tax Commission on or before the time required by Section 27-35-509, Mississippi Code of 1972, such company shall pay a penalty of up to ten percent (10%) on the tax as computed by the State Tax Commission, and in case of such failure, neglect or refusal, the commission shall make out an assessment against the company or companies, from the best information available.