Secretary of State: https://www.sos.ok.gov/business

Contact info:

Phone: (405) 521-3912
Fax: (405) 521-3771

Physical Address:

Business Filing Department
2300 N. Lincoln Blvd., Room 101
Oklahoma City  OK  73105-4897

Name search: https://www.sos.ok.gov/corp/corpInquiryFind.aspx
Corporation and LLC forms and fees: https://www.sos.ok.gov/business/forms.aspx
Department of Revenue: http://www.oktax.state.ok.us/
Department of licensing: http://www.ok.gov