Atty. David Arthur Thomsen

Atty. David Arthur Thomsen

David Arthur Thomsen is a lawyer practicing tax, taxation. David received a B.A. degree from Santa Clara University in 2004, and has been licensed for 22 years.

San Francisco San Francisco 22 yrs experience 22 year
Call (628) 266-5125 Book Appointment

Profile Summary

About David Arthur Thomsen at a glance

David Arthur Thomsen is a Bio-Rad Laboratories, Inc. based in San Francisco, California. They have 22+ years of legal experience, licensed to practice since 2004. Their practice focuses on tax. Admitted to practice in California (2004) and Washington (2005). Educated at Santa Clara University (B.A., 2004) and University of Washington (LL.M. Tax, 1998). Serands clients in San Francisco, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • David Arthur Thomsen is a lawyer practicing tax, taxation
  • David received a B.A. degree from Santa Clara University in 2004, and has been licensed for 22 years
  • David practices in San Francisco, CA

Practice Areas Explained

David Arthur Thomsen's Areas of Practice

Each practice area below reflects the types of cases David Arthur Thomsen handles, with a brief overview of what that area of law covers.

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

David Arthur Thomsen is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in San Francisco are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in San Francisco or all attorneys in California.

Frequently Asked

Common questions about David Arthur Thomsen

Where is David Arthur Thomsen's law office located?
David Arthur Thomsen's law practice is located in San Francisco, California. You can contact the office directly through this profile page.
What practice areas does David Arthur Thomsen handle?
David Arthur Thomsen focuses on tax. Each practice area listed reflects experience handling cases of that type in California.
How long has David Arthur Thomsen practiced law?
David Arthur Thomsen has 22+ years of legal experience and has been licensed since 2004.
Where did David Arthur Thomsen go to law school?
David Arthur Thomsen earned their education at (B.A., 2004); (LL.M. Tax, 1998).
How can I contact David Arthur Thomsen for a consultation?
You can contact David Arthur Thomsen directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Practice Areas

Education

B.A.
Santa Clara University
- 2004
LL.M. Tax
University of Washington
- 1998

Bar Admissions

California
Admitted: 2004
Washington
Admitted: 2005

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