Secretary of State: http://www.sos.ms.gov/business_services.aspx
Contact info:
Phone: 800-256-3494 or 601-359-1633
Fax: 601-359-1607
Physical Address:
700 North Street
Jackson, MS 39202
Name search: https://business.sos.state.ms.us/corp/soskb/CSearch.asp
Corporation forms and filing fees: http://www.sos.ms.gov/business_services_feesForms.aspx
LLC forms and filing fees: http://www.sos.ms.gov/business_services_feesForms2.aspx
Department of Revenue: http://www.dor.ms.gov/
Department of licensing: http://www.mississippi.gov/