$ 325-475 per hour
David Warren Klasing
About David
Biography
My personal interests include Politics, Religion, Health, Technology, Sports Cars, Wine and Fine Dinning. Extreme big wave surfing, Level 3.5 Tennis Player, Skiing and Boating.
Practice Areas
5
Practice Areas
Tax
65%
33 years | 10,932 cases
Tax Fraud and Tax Evasion
20%
18 years | 87 cases
Business
5%
18 years | 26 cases
Estate Planning
5%
33 years | 57 cases
Fees and Rates
Cost
Hourly Rates
Payment Methods
- Cash
- Check
- Credit Card
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Chat withLicenses
Licensed in California for 17 years
State: California
Acquired: 2008
No misconduct found
Location
Tax Law Office Of David W. Klasing
2603 Main St., Suite 1180, Irvine, CA, 92614
Tax Law Office Of David W. Klasing
Satellite Office, 10940 Wilshire Blvd Suite 1600, Los Angeles, CA, 90024
The Tax Law Offices of David W. Klasing
Satellite office, 473 E. Carnegie Drive, San Bernardino, CA, 92408
The Tax Law Offices of David W. Klasing
Satelite Office, 7 W. Figueroa Street, Santa Barbara, CA, 93101
The Tax Law Offices of David W. Klasing
Satellite Office, 14500 Roscoe Blvd, 4th Floor, Panorama City, CA, 91402
The Tax Law Offices of David W. Klasing
Satelite Office, 1000 Town Center Dr. Ste. 300, Oxnard, CA, 93036
The Tax Law Offices of David W. Klasing
Satellite Office, 2033 Gateway Pl 5th Floor, San Jose, CA, 95110
The Tax Law Offices of David W. Klasing
Satellite Office, 1390 Market Street, Suite 200, San Francisco, CA, 94102
The Tax Law Offices of David W. Klasing
Satellite Office, 505 14th Street, Suite 900, Oakland, CA, 94612
The Tax Law Offices of David W. Klasing
Satellite Office, 501 W Broadway, Suite 800, San Diego, CA, 92101
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David Warren Klasing's Reviews
Avvo Review Score
19 Client Reviews
Filter Avvo Reviews (19)
Refine reviews to match your needs. Use the filters to quickly surface reviews that align with your case or priorities.
Practice Areas
Showing 1 - 5 of 7 reviews | General Knowledge
Posted by Rich | September 20, 2025
Very Knowledgeable
Dave did a great job of quickly understanding my situation and offering advice. I felt he had a good command of the regulations and was able to offer me suggestions on how to proceed. I will definitely use him again.
Posted by Chris | September 02, 2025
Very Grateful the Advice
David was very helpful. He advised me on a very complex matter. I am very grateful.
Posted by Bill | April 23, 2025 | Tax
Knowledgeable and Professional
I had the pleasure of consulting with David recently, and I couldn't be more grateful for the clarity and guidance he provided. He was professional, knowledgeable, and genuinely helpful throughout our conversation. I walked away with peace of mind and a clear understanding of my situation. Highly rec...
Posted by Ed | January 22, 2024 | Tax
Fast, easy, straight forward
After consulting various financial advisors and CPAs who all responded with "I don't know" or "I cant help you" to my questions, working with David was a breath of fresh air. He had the answers I needed and steered me in the right direction with confidence and expertise. Highly recommend his services...
Posted by Michael | February 15, 2017 | Tax
Consultation on FTB Innocent Spouse Case
David was kind enough to consult with me on a FTB appeals matter. I appreciated his direct and honest advice about my most logical plan of action. He was incredibly knowledgeable and helped me make some important decisions.
David Warren Klasing's Lawyer Endorsements
"Dave is both a superb tax lawyer and an outstanding CPA. He provides highly competent services relating to tax and tax law, including issues relating to tax compliance, audit representation, and tax transactions. I strongly recommend him."
"David brings a unique set of qualifications to his legal practice as a tax attorney. His considerable experience as a CPA lends itself perfectly to his law practice, and allows him to tackle some of the toughest, most complex tax problems facing clients in a legal setting. David is friendly, great with clients, and works diligently to serve his clients' interests. I can strongly recommend David Klasing as an experienced, dedictated, effective tax and estate planning attorney."
"I endorse this lawyer."
"I have known Dave for several years. He is a an excellent and knowledgeable tax attorney and CPA who is well respected by his peers. He has spoken to the OCBA Solo Section and has demonstrated his knowledge and integrity. He is committed to achieving the best result for his clients. You will be in excellent hands if Dave is your attorney. I wholeheartedly endorse him."
"I endorse this lawyer."
"David is skilled in complex tax issues and provides a high level of service to his clients. I endorse this lawyer."
"I endorse this lawyer. He has provided excellent and accurate responses to questions on Avvo."
"David is a talented CPA and tax attorney. With him at the helm, his tax firm is one of the tightest ships in Southern California."
"Mr. Klasing brings unique qualities to his answers on Avvo being both an attorney and CPA. His answers on Avvo are accurate, analytic, and customized to the needs of the Avvo asker. These are exactly the qualities that every client would look for when hiring an attorney."
"David Klasing is a 'must go to' attorney for all tax issues. The scope of his knowledge of tax law is overwhelming and his commitment to the local bar association is to be commended. He is always willing to lend a helping hand to others in the legal community, and if he does that for free, I can only imagine how well he treats paying clients. I highly recommend and endorse attorney Klasing."
"I have had the distinct honor of knowing tax attorney, David W. Klasing, for about five years. In addition to being a lawyer, he is a Certified Public Accountant (CPA) a swell. We are both members of the American Association of Attorney CPAs (AAA-CPAs) and interact with each other often. I have found David to be a competent tax professional. David recognizes the importance of providing his clients with the best services available in the profession and he is very good at it. I am proud to call David a colleague and endorse him."
"I endorse this lawyer. David Klasing is an expert in criminal tax fraud and tax evasion and I would recomend him as an attorney to consult with if you need expert advice."
"I endorse this lawyer."
"I endorse this lawyer. David is a respected member of the Orange County legal community. He has a solid grasp of his area of law. I attended a talk by David this year before a group of Orange County attorneys and was impressed with his knowledge and experience."
"David Klasing is an expert in the field of taxation. He is a professional, and diligent lawyer - with exceptional skill and knowledge. I endorse David without reservation."
"David’s strong determination has earned him a unique set of qualifications. Not only has he practiced as a CPA for close to 20 years, he has enhanced his work experience by earning both a Master’s Degree in Taxation and a law degree. He combines his experience and knowledge with a relaxed personal manner, allowing him the invaluable ability to clearly explain complicated taxation issues. As an estate planning attorney, I highly recommend David for the resolution of tax law issues and I am confident that he provides clients with excellent representation."
"I have never had second thoughts about referring my clients to David, because he has always treated them with integrity, courtesy and dedication. It's with the greatest enthusiasm that I endorse David. His professional and ethical standards are second to none, and to count him as a colleague is a blessing."
"David is extremely expert in his practice areas. His background, training, and experience place him in the upper tiers of tax practitioners in the community. I have heard him lecture on tax and accounting issues and discussed such issues with him myself. Each time, I have been impressed by the depth of his knowledge as well as his awareness of current and emerging trends."
"I endorse this lawyer. David is a fine tax attorney who represents his clients with full commitment and professionalism."
"David has a unique set of skills, knowledge and experience. He has helped me numerous times and I highly recommend him for Tax/ Accounting issues."
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Experience
Honors
2011
Certificate of Appreciation - Business Academy Mentor Program, Ocean View School District
Work Experience
2009 - Present
OWNER, TAX LAW OFFICE OF DAVID W. KLASING
2006 - 2007
TAX COMPLIANCE TECHNICAL REVIEWER, ONISKO AND SCHOLZ, LLP
2005 - 2006
TAX AND ACCOUNTING MANAGER, KELLY & CO
2004 - 2005
SENIOR TAX ACCOUNTANT, ROBERT KLEMS, JR., CPA
2003 - 2004
SENIOR TAX ACCOUNTANT, HALLSTEIN & WARNER, LLP
2002 - 2003
SENIOR TAX CONSULTANT, DIVERSIFIED VETERINARY MANAGEMENT
2000 - 2001
SENIOR TAX ACCOUNTANT, CORBIN & WERTZ
1997 - 2000
AUDIT DEPARTMENT SUPERVISOR, STEPHENS, REIDINGER & BELLER
Associations
2011 - Present
Orange County Bar Association, Tax Law SectionVice Chair
2011 - Present
California Society of Certified Public AccountantsState Tax Committee Member
2010 - Present
State Bar of California Tax Procedure and Litigation CommitteeChair
2009 - Present
The State Bar of CaliforniaMember - Tax Section
2009 - Present
Los Angeles County Bar AssociationMember - Tax Section
2005 - Present
American Bar AssociationMember - Tax Section
2005 - Present
American Association of Attorney-Certified Public AccountantsMember
2005 - Present
Orange County Bar AssociationMember - Tax Section
1998 - Present
California Society of Certified Public AccountantsMember
Sample of Legal Cases
Client's Preparer under Criminal Investigation
In the end. Appeals settled with my client owing 65K in tax penalties and interest and all subsequent years amended and client back in full compliance. (no fraud penalties – no criminal charges)
Attorney accused of carrying on a hobby rather than a business
My client's position was accepted by tax court
Education
2007
WESTERN STATE UNIVERSITY, COLLEGE OF LAW
JURIS DOCTOR
2002
Golden Gate University
Master of Science in Taxation
1993
California State University, Los Angeles
Bachelor of Sciene
Speaking Engagements
2012
Orange County Bar Association
Tax and business considerations for solo's and small law firms
2011
Orange County Bar Association
Tax planning for law firms & subchapter S Corporations
Publications
2011
FindLaw KnowledgeBase.
Federal Tax Evasion Investigations: Innocent Until Proven Otherwise
2011
FindLaw KnowledgeBase
Practicing Good Habits Before an Audit
2011
Findlaw KnowledgeBase
Foreign Bank Account Disclosure Requirements and Tax Evasion Risks
2011
FinaLaw KnowledgeBase
IRS will soon be able to detect previously undisclosed foreign accounts
2011
24-7 press release.com
Fighting an Irs Tax Audit What You Need to Know
2011
24 - 7 press release.com
IRS Crackdown on Offshore Accounts Drawing International Criticism
2009
http://dwklasing.blogspot.com/
Taxation Blog
2008
Orange County Business Journal
Mergers and Acquisitions as a Means of Growth
Languages
English
Activity
Legal Answers
Legal Guides
Legal Answers
Q&A
What attorney should I consult?tax attorney?International tax attorney?Tax attorney doublecertified CPA?or just an accountant?
24 Nov 2021
Q&A
An IRS criminal investigation special agent showed up at my house and wants to talk. What should I do?
23 Nov 2021
Q&A
Possibility of criminal charges for late filing taxes / owe?
19 Jul 2021
Legal Guides
Video Legal Guide
Warning signs an IRS tax audit has gone criminal
29 Feb 2016
Video Legal Guide
Why should I hire a tax attorney to represent me in a tax audit
29 Feb 2016
Video Legal Guide
What is an eggshell audit
26 Feb 2016