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Mr. David Klasing holds dual California licenses that enable him to practice as both a Tax Attorney and as a Certified Public Accountant. Mr. Klasing has more than 20 years of professional tax, accounting and business consulting experience coupled with an extensive knowledge of federal and state tax codes, regulations, and case law. If you have been contacted by the IRS or a California Tax Agency, we can help. Helping tax payers with audits, levies, garnishments and liens.

The firm's attorneys and staff utilize education, intelligence and integrity to provide individualized, effective solutions for clients facing problems with the IRS and state and local tax authorities. Their goal is to identify and isolate the problems and work to minimize tax liabilities and penalties. Their lead attorney, David Klasing was a former auditor and is a current practicing CPA and attorney.

Contact the Tax Law Offices of David Warren Klasing today if you need legal assistance with any of the following:

  • Tax Law
  • Tax Controversy
  • Criminal Tax
  • Non Filers Representation
  • Off-Shore Accounts and Filing Taxes
  • Routine High Risk Egg Shell Audits
  • IRS and California Taxation
  • Tax Fraud
  • Tax Evasion
  • Litigation
  • International Tax Law
  • Corporate Tax
  • Tax Planning and Preparation 

Whatever your tax issue, you can rely on the Tax Law Offices of David Warren Klasing for thorough representation and sound advice.

Call Attorney David Klasing today at 949-681-3502 to arrange your initial consultation. Serving clients in Los Angeles County, Orange County, San Diego County, Riverside County, San Bernardino County, and surrounding areas.

Attorney Profile

Attorney David Warren Klasing


  • All California State Courts
  • U.S. District Court for the Central District of California
  • U.S. Tax Court

Admitted To The Bar:

  • 2008


  • Western State University College of Law, Fullerton, California, J.D.
  • Golden Gate University, San Francisco, California, M.S.
  • California State University, Los Angeles, California, B.S.

Professional Memberships and Achievements:

  • California State Bar Association, Chair
  • Tax Procedure and Litigation Committee (2012-2013)
  • Orange County Bar Association Tax Section (2013), Chair
  • American Bar Association Tax Section
  • Orange County Bar Association,Tax, Business and Corporate Law, Trust & Estate Sections
  • The California Society of Certified Public Accountants State Committee on Taxation
  • American Association of Attorney Certified Public Accountants
  • Beta Alpha Psi


Tax Issues Resolved
I own a multi-million dollar business and I came to Dave with an accounting nightmare; poor records, disorganized books and tax liabilities into the 100’s of thousands of dollars going back several years. My situation could have gotten very ugly without proper professional help. Dave and his team went to work untangling my books and cleaning up my accounting, including the production and filing of amended returns. Dave placed himself between me and the IRS for the entire process; I never had to directly deal with the IRS or any other agency. As can be imagined, this was a nerve racking experience and Dave’s confident, reassuring nature helped me tremendously in getting through it. I’m very satisfied with the quality of service I received from Dave and his team and I recommend them without reservation.

Tax Client

Great Tax Specialist
I highly recommend David for his services. I still do not know how he managed to handle the "mess" I presented him with, but he did it very successfully. I was being audited by the IRS, for the first time, and the stress level was high. I had never dealt with that before and I am definitely not an accounting guy. The original tax estimate that I had to pay was roughly 70K with no penalties. In this economy and with a non-working wife and a baby I was freaking out. David and Anne spend a lot of time gathering all the documents and properly reviewing for the audit. It did take us 2 month to collect everything but we were able to present a good case. I was actually interviewed by the IRS myself with David present. It took exactly 3 months from start to finish to get the final verdict which was outstanding. David managed to get me a refund one of the years and pay only 10K for the other year in question. Overall my net liability was 3K, signed and sealed. My wife and I could not be happier and that's why we are staying with David from now on as out accountant and tax specialist. Thank you Dave and Anne!

Tax Client

The right attorney for the job.
I came to Dave and his associates with a complex issue regarding a non-profit. Others may have looked at it as hopeless. They recognized our service to the community, and committed to help us resolve our tax problem. I found Dave and his associates to be knowledgeable, kind and hardworking people that know tax law inside and out. They were very sensitive to our request to find a solution so that we could continue to help the community. With their assistance, we were able to immediately open the channels of communication and start on the path to resolution of the tax issue. I am immensely grateful for thier help.

Tax Client

Office Locations

2603 Main St., #1180
Irvine, CA 92614

Los Angeles
10940 Wilshire Blvd., #1600
Los Angeles, CA 90024

San Diego
501 W. Broadway, Suite 800
San Diego, CA 92101

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