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Nationwide Tax Controversy Practice

Our practice is nationwide and we represent clients from around the world. The sooner you have experienced tax defense attorneys on your side, the sooner you can get your life back. We work from our home offices around the country, including Phoenix, Arizona, and Encinitas, California. When you hire The MacPherson Group, you are getting much more than attorneys with extensive tax controversy experience; you are also getting their nationwide network of tax associates, CPAs, and Advisors. We associate with local counsel when required by local rules of practice.

We also work closely with independent CPAs according to the needs of our clients; e.g., return preparation including reconstruction when records have been lost; many of our clients have not filed tax returns for 10 or 20 years, if ever. We often recommend such professionals to our clients from among our nationwide network. It is our practice to hire such professionals under a “Kovel” agreement to protect the attorney-client privilege.

Attorneys Nathan and Scott MacPherson continue with the legacy of “The MacPherson Group”: their father’s 40+ years of legal experience together with over 20 years of their own. Nathan's firm, The MacPherson Group, LLC, is an Alaska professional limited liability company; Nathan often travels the country visiting clients; Scott's firm, MacPherson Law, PLLC, is an Arizona professional limited liability company; Nathan's and Scott's civil and criminal tax defense practice is nationwide. Their father, Mac MacPherson, started the predecessor law firm (The MacPherson Group, P.C., an Arizona professional corporation) and advises as an independent contractor to his sons' two law firms from his homes in both Arizona and California.

Donald W. (Mac) MacPherson


Mac is the only attorney in the country who is a board-certified specialist in both tax law and criminal law, and his clients have ranged from a Hollywood stunt double, Hollywood star, CIA operatives, James Earl Ray, and street preachers to two governors, three state senators, and a major U.S. airline.

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Nathaniel K. (Nathan) MacPherson


Nathan is admitted to practice law on two continents and his clients have ranged from foreign finance ministries and major global banks, to a publicly traded company and a bank director, to German nobility, a Hollywood star, and a five-star restaurant, to pastors, churches, and others with civil and criminal tax issues.

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Scott MacPherson


Scott is admitted to practice law in Arizona, California, and Washington DC. He was the editor of three books on federal income tax law and contributes articles every year to a nationally-circulated monthly tax newsletter. He has negotiated offers in compromise, installment agreements, and removal of wage levies for clients all across the country.

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Dorenda K. Cisneros

Our office manager & legal assistant Dorenda has been with the firm for over a quarter of a century. Dorenda started with the MacPherson Group as a typist in the very early 1990s and her skills and duties have advanced to all areas of paralegal work and law practice management. During her time off she enjoys teaching fitness classes and caring for her grandchildren.

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Samantha Haley

Samantha has been with the firm for over a decade; she first worked for the firm when she was a 17-year-old high school student and later returned permanently. She lives in Cheyenne, Wyoming, with her husband and three children. Samantha enjoys hunting, crafting, cooking, and mowing any chance she gets.  She spends much of her free time as a 4-H leader mentoring about 60 Cheyenne youth, including her own children.


We utilize trained independent contractor professionals who are not attorneys; they work with our clients but do not give independent legal advice. We have close relationship with several CPAs who are experienced in the complex work required during active criminal and civil tax cases, especially when no returns have been filed for 10 or 20 years or more. Our financial advisors help clients not only get back on their feet, but actually improve their financial position as a result of the IRS issues.

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