Secretary of State: http://www.sos.state.oh.us/SOS/

Contact info:

Phone: 614-466-3910 or Toll free: 877-767-3453

Mailing Address:

P.O. Box 250
Columbus, OH 43216

Physical Address:

Secretary of State
Business Services Division
180 E. Broad St., 16th Floor
Columbus, OH 43215

Name search: http://www2.sos.state.oh.us/portal/
Corporation and LLC forms and Filing fees: http://www.sos.state.oh.us/sos/
1st Stop Business Connection: http://www.odod.state.oh.us/Onestop/
Ohio business important links:http://development.ohio.gov/Entrepreneurship/faq.htm 
Department of Revenue: http://tax.ohio.gov/
Department of Taxation(licensing): http://tax.ohio.gov/divisions/sales_and_use/license.stm