Welcome to The Tax Lawyer - William D. Hartsock Esq. Tax Attorney Inc. A full service Tax Law Firm.

Our Services

Tax Attorney

William D. Hartsock, Tax Attorney Inc has been aggressively and successfully representing clients before the IRS, FTB and EDD for over 25 years. The Tax Lawyer will fight for your best interests.

IRS Audits

IRS audits require an understanding of the rules, regulations and procedural protections afforded by the IRS to ensure the Audit does not spread to additional years, entities and types of tax.


International tax issues require in depth understanding of the complex relationship between the US Internal Revenue Code and the tax laws in foreign countries. This is as highly specialized niche.

Tax Fraud & Tax Crimes

Tax fraud is the allegation by the IRS that false representations were made on your tax return. Tax crimes are the acts taken by individuals with the intent of defrauding the IRS.

Tax Collections

The IRS has tremendous power to initiate tax collections procedures including liens against property and assets, bank levies and wage garnishments. These actions can be stopped if the proper steps are taken.

Tax Appeal

Once a decision has been reached by a revenue agent, if that decision is not satisfactory then you have the right to appeal. Typically the best settlements come at the appeals level.

Offer In Compromise

If a tax payer cannot possibly afford to pay off their tax debt, an Offer in Compromise allows a negotiated settlement with the IRS based on a formula that considers all income, assets, debts and liabilities.

Bankruptcy & Taxes

Certain taxes may be discharged in bankruptcy if the tax payer qualifies based on a myriad of rules and exceptions. This can significantly help to people that are working to get themselves back on track.

Tax Evasion

Tax evasion is the willful intent to make misrepresentations to the IRS in order to not pay taxes. This can result in prison time and therefore requires aggressive expert representation.

Tax Litigation

Tax litigation is requires in depth knowledge of the rules, regulations and procedures that govern tax court processes, as well as strategic presentation and expert negotiation skills.

Innocent Spouse Relief

If a tax audit has determined that additional taxes are due from a "married filing jointly" return, Innocent Spouse Relief can allow one spouse to get out of the additional debt.


Every US person with interest in or authority over a foreign bank account is required to file an FBAR every year by June 30th. This is an information return only, meaning an FBAR does not incur tax debt.


How-To Successfully Defend A Tax Case

Free Consultation

The first step is getting to know the facts of the case and helping you understand your options.

Develop A Strategy

Based on the facts of the case and applicable laws and timeline, we will develop a case strategy.

Collect Facts

A deep dive into fact collection to ensure that nothing is overlooked and there will be no surprises.

Forensic Audit

We will perform a forensic audit to ensure that every figure is well documented and air tight.

Organize Documents

Our methodology for organizing all documentation makes facts easy to reference as we build your case.

Build A Solid Case

With all documentation in order, we will build a solid case to achieve the outcome that you want.

Presentation & Negotiation

This is where our decades of experience and skills in negotiation make all the difference.

Best Possible Settlement

Our expertise, experience, strategies, skills and processes have created a track record of success in achieving the best possible outcome.

All conversations with a tax attorney are protected under Attorney-Client Privilege and will never be shared with the IRS or FTB.

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Top Attorneys in San Diego
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The Tax Lawyer William D. Hartsock, Tax Attorney Inc.

This tax law firm will use its best efforts, full staff and every known applicable law to protect your rights and interests against the IRS, FTB and EDD. It is our mission to attain the most favorable outcome possible for each and every client.

Tax Lawyers That Aggressively Defend Your Rights

Revenue agents will typically attempt to collect more information than absolutely necessary or try to find reasons why they should expand their collection of your information to include additional tax years, etc... Most people, CPAs, Tax Preparers and many tax attorneys will bend over backwards to give in to the requests of the revenue agent. Unfortunately, additional information can potentially lead to additional penalties or prosecution.

An experienced and aggressive tax lawyer makes all the difference. Everything with the IRS is a negotiation. They want to know how well you have documented the facts, they want to see how well you develop your case, and they want to see how well you know the law. That is why our firm begins by creating an impeccable record of the facts and then aggressively uses the law and the procedural protections of the IRS, FTB and EDD. In this way agents of the IRS, FTB and EDD are satisfied with your documentation and discouraged from pursuing any matters that are beyond the minimum scope of their initial investigation.

A Respected Personal Income Tax Lawyer

Since 1985 The Tax Lawyer, William D. Hartsock has worked with people to protect income, assets and personal freedom by mitigating penalties and interest, negotiating the most favorable resolution of tax liabilities possible and defending against criminal prosecution. We understand the effects that stress and worry from tax problems can have on a person and their family. Having tax lawyers with our experience, expertise and successful track record on your side is the first step in putting these issues in your past.

When do you need a tax attorney?

Our Clients


A Qualified Business Tax Lawyer

When working in business tax law our firm will first conduct an in-depth and thorough analysis of the financial statement to ensure the business is getting all of the tax deductions that it is entitled to and to ensure that we develop the key facts to the greatest extent possible. Typically our tax lawyers work with corporate clientele that consist of small to mid-sized businesses.

An Experienced International Tax Lawyer

William D. Hartsock, Esq. has been dealing with the IRS voluntary disclosure program since the 1980's well before it was a popular program. As a tax lawyer, Mr. Hartsock has been a leader in representing US citizens, resident aliens and those that pass the substantial presence to successfully navigate the voluntary disclosure program and avoid criminal prosecution by the IRS and Department of Justice for income and assets that are held outside of the US.

The Top Tax Lawyer In San Diego

William D. Hartsock has been a San Diego tax lawyer since the 1980's. Since 2009 Mr. Hartsock has been the Chairman of the San Diego County Bar Association, Pro Se Tax Payer Program and has been at virtually every tax court calendar call and he knows all of the revenue officers, special agents, appeals officers and settlement officers down at the local IRS office.

This firm deals with 100% tax law cases representing clients throughout California, and is intimately familiar with both the US Tax Court and the 9th District Court of Appeals.

Tax Law Books by William D. Hartsock, Esq.

If you are seeking counsel on virtually any area of tax law, Mr. Hartsock has literally written the book on it. Click any cover to view the book on Amazon.

International Taxes - book written by William D. Hartsock, Esq.
International Taxes: How to satisfy the US governemnt and maximize protection of your foreign income and assets
IRS Audits - book written by William D. Hartsock, Esq.
The IRS Audit Roadmap: What you must know to avoid wrong turns when navigating and IRS audit.
Tax Appeals - book written by William D. Hartsock, Esq.
Tax Appeals: Getting the IRS to see things your way.
Tax Fraud, Tax Evasion and Tax Crimes - book written by William D. Hartsock, Esq.
Tax Fraud, Tax Evasion and Tax Crimes - What you must know about IRS charges, investigations and defense strategies.


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