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William David Hartsock

Tax Attorney at San Diego, CA

5.0   8 reviews
Free consultation Virtual consultation available
Free consultation Virtual consultation available
  • Licensed for 36 years
    State CA
    Acquired 1987
    Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About William

Learn William’s areas of practice.

Practice areas
  1. Tax
    Since the early 1980's William D Hartsock, Esq. has been aggressively representing client interests before the IRS, EDD and FTB. Well known as an expert in tax law, Mr. Hartsock has built a firm that is highly respected and sought after.

    40 years, 2,000 cases

  2. Tax fraud and tax evasion
    Since the early 1980's William D Hartsock has represented over 1,000 clients in issues involving tax fraud or tax evasion with a high rate of success. Mr. Hartsock is known for aggressive client defense and consistently provides clients with the best opportunity to reduce or eliminate penalties and avoid criminal prosecution.

    40 years, 1,000 cases


Founded in 1982, the law firm of William D. Hartsock specializes in tax law services. This tax law firm concentrates on not only providing the legal services necessary to defend your rights before the IRS and Franchise Tax Board, but also the accounting and book keeping services that are an integral part solidifying your case. We have tax attorneys, CPA's, enrolled agent, tax preparers and book keepers all in one firm, each specializing in their own particular field. In this way we are able to offer the most aggressive tax services available. 


William D. Hartsock earned his Masters in taxation at the University of San Diego- School of Law after completing University of San Diego School of law Juris Doctorate and an undergraduate Accounting Degree at the University of Nebraska-Lincoln.


Photos and videos

In this video The Tax Lawyer, William D. Hartsock talks about IRS audit notices, the importance of responding and how to navigate the issue.
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The Tax Lawyer - William D Hartsock Tax Attorney Inc
12636 High Bluff Drive, Suite 110
San Diego, CA, 92130-2071


5.0 / 5.0
  8 customer reviews
5 Star
4 Star
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1 Star
Posted by anonymous | February 1, 2013
Aggressively making happy customers
I am most impressed by Bill's relentless drive to make happy customers and he is aggressive. He tends to understate what he can deliver, so I checked with him frequently in the initial a couple of months. After he won the first round with IRS perfectly, I was really impressed, but felt that we were probably a little bit lucky. Quickly, he won the second round, again perfectly. Then I just forgot about my IRS audit all together: I did not contact him and did not even think about it at all, just waiting to receive monthly bill from him and pay it, I was 100% assured that my case was in capable hands. I slipped so far on this slope that I even forgot to return his call on monthly status update. Why should I care? Bill is handling it! Then all of a sudden, my audit is over: I owe IRS not a penny. By the way, his staff, Sherry and Thida, in particular, are nice and caring. After I handed them a tone of my tax documents, I was expecting that Sherry would sit down with me to decipher them, but she did it without a single question.
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Posted by anonymous | April 20, 2011
Miracle Worker
We had the worst of the stereotypical auditors. We'd been dealing with her for three years until the firm with whom we had been dealing missed an appointment. They told us it was all over, we would have to pay $30K+. Bill Hartsock got us a new appointment with a new auditor After Bill met with them, we owed the IRS NOTHING!!
Posted by Todd | March 29, 2021
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Bill is Candid, Honest, & Friendly - Cost Benefit Consultation
Bill was delightfully responsive and answered my call immediately. He was wonderful. He listened to the details of our situation, asked some additional questions, and laid out his advice on the matter. I was in a bit of a panic when I called and he calmly walked me through and explained our options and gave me just the support we needed. I highly endorse him. Thank you so much Bill!
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Posted by anonymous | February 26, 2021
This review is from a person who hired this attorney.
| Hired Attorney
CDTFA Offer & Compromise
Hiring Bill from a google search was the best thing that ever happened to me. My business owed over $250,000 to the CDTFA. I was hoping that Bill firm could help me reach a manageable payment plan. In the end, Bill & Dan were able to negotiate an offer and compromise for a fraction of what was owned, allow me to resolve a problem that I though would never go away. The entire staff was fantastic. I would recommend Bill Hartsock to anyone seeking a competent knowledgeable and professional tax attorney. Thank you for me there for me.
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Posted by Dan | February 21, 2019
This review is from a person who hired this attorney.
| Hired Attorney
Bill and his team are the best
Bill Hartsock and his team provided me the most professional, knowledgeable, aggressive and fair representation I could have ever asked for. Bill and his team are straight up and know tax law. This was most important to me, as the team helped me understand that although they couldn’t make my tax problem go away, they could and did minimize to the fullest and fairest extent my tax liability exposure. I would definitely go to Bill and his team again. They are simply the best in their field
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Posted by David | December 13, 2017
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Greatest tax attorney ever!
Bill is the most knowledgeable tax attorney in the business. I am so impressed! If you have tax issues, Bill Hartsock is your man!
Posted by anonymous | June 24, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Does What He Says He Will Do
I was referred to Bill from another attorney. From the start, Bill told me what he could do and what he couldn't do. He did everything he told me he could do, and he did it well. He provided insight and counsel into every aspect of the case, and followed through on all the details. I would hire him again, and I do refer him to others.
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Posted by Joey | June 21, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Life Saver
My father started a restaurant over 50 years ago in a less complicated time. My brother and I took over operations of the restaurant, but we did not do the book keeping. Our father is a very proud man, and wanted to stay connected ton the business, but also make our life easier by helping. Needless to say, certain I's were not dotted and some T's not crossed. We were in a very tuff spot, and needed the best advice available. My cousin is a personal injury attorney and did some research for us. She recommended William Hartsock, and thank God she did. It was never easy, our case was about a father of two son's wanting to help. Little did our dad know he was making unintentional errors. Bill guided us, fought for us, and told a truthful story about a family who achieved a dream, but made some mistakes along the way. Mr Hartsock never sugar coated anything, but if you want to be represented by the best, he's your man. Many thanks Bill, our family was blessed to have you!
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  • Free Consultation 60 minutes
Payment methods
Cash, Check, Credit Card


AVVO RATING 9.6 (Superb)

Work Experience

  • Lead Attorney
  • William D Hartsock, Tax Attorney Inc.
  • 1982 - Present


  • University of San Diego
  • LL.M - Master of Laws
  • 1994
  • University of San Diego School of Law
  • JD - Juris Doctor
  • 1987
  • Univ of Nebraska
  • 1983


  • San Diego County Bar Association, Pro Se Committee
  • Chaiman
  • 2000 - Present
  • San Diego County Bar Association
  • Member
  • 1987 - Present
  • Los Angeles County Bar Association
  • Member
  • 1987 - Present

Languages Spoken

  • English

Honors and Awards

  • Super Lawyer
  • SuperLawyers
  • 2018
  • Super Lawyer
  • SuperLawyers
  • 2017
  • Super Lawyer
  • SuperLawyers
  • 2016
  • Super Lawyer
  • SuperLawyers
  • 2015
  • Certified Specialist - Taxation Law
  • State Bar of California
  • 1994
View all awards

Attorney endorsements

Received (2)
Given (0)
Endorse William
Tax Attorney | Mar 31
Relationship: Fellow lawyer in community
"Bill is smart, knowledgeable, and experienced - an excellent attorney whom I highly recommend."
Tax Attorney | Dec 03
Relationship: Fellow lawyer in community
"Bill is an excellent tax attorney, knowledgeable, experienced, responsive, thorough, and genuinely cares about obtaining the best results for his clients. Bill has done an excellent job for each and every client that I've referred to him over the years and I highly recommend him."
This attorney hasn't created any attorney endorsements recently on Avvo.

Avvo Contributions

This attorney hasn't created any legal answers in Q&A or legal guides recently on Avvo.

San Diego Tax Lawyer William David Hartsock
William David Hartsock
Tax Attorney
San Diego, CA
Licensed for 36 years
Free Consultation
Virtual consultation available