The Van Dusen Law Firm LLC

The Van Dusen Law Firm LLC is a tax attorney in Longmont, Colorado. The firm provides legal representation in tax planning, controversy, and resolution, tax audits, estate planning and probate matters, business planning and formation, and contracts and negotiations. It holds a rating of 4.4 based on reviews from clients it has served in the area.

The firm is led by founder William R. Van Dusen, Jr., who holds a Juris Doctor degree and a Master of Laws in Taxation from the University of Denver Sturm College of Law. He brings more than 25 years of legal experience spanning the public and private sectors, including service as an Assistant Attorney General, Deputy District Attorney, and Assistant City Attorney in Colorado. His practice covers federal, state, and local tax matters, criminal matters, litigation, administrative hearings, contract drafting, and estate planning. He has successfully defended over 500 clients in dealings with the IRS and state tax authorities, working cases from initial notice through appeals and Tax Court. He is admitted to the Colorado Bar, the United States Tax Court, and the United States District Court for the District of Colorado, and also teaches professional ethics and continuing education courses for attorneys. The Longmont office sits on 5th Avenue, about a tenth of a mile from Main Street and the Longmont Theatre Company, with the Longmont Carnegie Library roughly a third of a mile away.

Clients have rated the firm positively, reflecting the experience Bill Van Dusen brings to tax controversy, audit defense, and broader estate and business planning matters across the Longmont area.