Secretary of State: http://www.sos.louisiana.gov/tabid/66/Default.aspx

Contact info:

Phone: (225) 925-4704
Fax: (225) 922-0452
Email: [email protected]

Mailing Address:

P. O. Box 94125
Baton Rouge, LA 70804-9125

Physical Address:

8585 Archives Ave.
Baton Rouge, LA 70809

Name search: http://www400.sos.louisiana.gov/app1/paygate/crpinq.jsp
Corporation and LLC forms: http://www.sos.louisiana.gov/tabid/814/Default.aspx 
Filing fees: http://www.sos.louisiana.gov/Portals/0/332FeeSchedule.pdf
Department of Revenue: http://www.rev.state.la.us/
Department of Licensing: http://www.sos.louisiana.gov/tabid/123/Default.aspx