Secretary of State: http://www.sec.state.ri.us/corps

Contact info:

Phone: (401) 222-3040
Fax: (401)222-3879
Email: [email protected]

Physical Address:

Corporations Division
148 W. River Street
Providence, Rhode Island 02904-2615

Name search: http://ucc.state.ri.us/CorpSearch/CorpSearchInput.asp
Corporation and LLC forms and fees: http://sos.ri.gov/business/filings/corporateforms/ 
Department of Revenue: http://www.tax.state.ri.us/
Department of licensing: http://www.dbr.state.ri.us/