Colorado SOS -
Suite 200
Department of State
1700 Broadway, Denver, CO 80290
303-894-2200 & press 2
303-869-4864 (FAX)
business@sos.state.co.us
New Mexico SOS -
New Mexico State Capitol
325 Don Gaspar, Suite 300, Santa Fe, NM 87503
505.827.3600 or 800.477.3632
MaryE.Herrera@state.nm.us
From the IRS website -
If you suspect or know of an individual or company that is not complying with the tax laws, you may report this activity by completing Form 3949-A. You may fill out Form 3949-A online, print it and mail it to:
Internal Revenue Service
Fresno..., CA 93888
You may use Form 13909, Tax-Exempt Organization Complaint (Referral) Form, to report an abusive transaction involving an exempt organization. To send a written complaint by mail, send to the following address:
IRS
EO Classification
MC 4910DAL
1100 Commerce Street
Dallas, TX 75242
In addition, the IRS Office of Tax Shelter Analysis maintains a hotline that can be used to provide information about abusive tax shelters.