Phone: 909-466-6900 | Email Us

 
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About Cornerstone Services

Cornerstone is owned and operated by Kathryn L. Dunn, an enrolled agent. Kathryn has over 25 years experience in tax preparation and bookkeeping. She is a professional who is committed to serving you.

Our success is a result of your success. We believe in the value of relationships, and we view every client relationship like a partnership.

We are committed to providing close, personal attention to our clients. We take pride in giving you the assurance that the personal assistance you receive comes from years of advanced training, technical experience and financial acumen. Our continual investment of time and resources in professional continuing education, state-of-the-art computer technology and extensive business relationships is indicative of our commitment to excellence.

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Office: 8480 Red Oak Street, Rancho Cucamonga CA 91730-3815
Phone: (909) 466-6900 | Fax: (909) 533-2159 | Email: kathy@ctbpro.com

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