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I am a Tax Attorney who works with clients across Colorado. I specialize in reducing and resolving tax liabilities with Internal Revenue Service and Colorado. I also prepare back and current tax returns for individuals and businesses and defend clients in IRS examinations and audits. I received my law degree from the University of Colorado in 2000 and have been in private practice for 15 years.
My goal is always to find a permanent solution to your tax problem. I always strive to achieve the best possible results in the shortest amount of time and at the lowest cost. I always try to treat my clients like friends and family.
I was born and raised in Colorado and completed my undergraduate studies at Colorado State University in 1996. I graduated with honors and then attended the University of Colorado School of Law in Boulder, Colorado where I received my Juris Doctorate in 1999. I passed the Colorado Bar Exam in 2000 and have been practicing law ever since.
I currently reside in Boulder, CO. My family and I enjoy all of the outdoor activities that Colorado has to offer, including camping, hiking, biking, skiing, snowboarding and running.
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Practice Areas
25 years | 625 cases
25 years | 15 cases
25 years | 10 cases
25 years | 20 cases
Free Consultation
$0 first 60 minutes
State: Colorado
Acquired: 2000
No misconduct found
Fax
6525 Gunpark Dr, Ste 370 #122, Boulder, CO, 80301
cotaxattorney.com/
Other places you can find John online.
24 Client Reviews
Showing 6 - 7 of 7 reviews | Debt Settlement
Posted by Nick | August 21, 2015 | Hired Attorney | Debt Settlement
tax lawyers
I had every commercial beat. I owed the federal government $ 394,000 and John settled with them for $250. He is amazing at what he does.
Posted by Eric | August 20, 2015 | Hired Attorney | Debt Settlement
John Claudell #1 in my book
John helped me with my tax debt with both the IRS and the State of CO. He helped me get the debt settled and paid in full. John is worth every penny when you are in a sticky situation. I won't ever need his services again, but if I did he would be the first call I made. Thanks again John.
Tax fraud and tax evasion lawyer | Aug 26
Relationship: Fellow lawyer in community
"Mr. Claudell is an exceptional attorney. I have been an attorney for 24 years and served as a judge, magistrate, prosecutor, law professor, and private attorney. However, even with all of that experience, I learn from his answers on Avvo each and every day. If you have the chance, hire him in an instant."
Bankruptcy and debt lawyer
Real estate lawyer
Bankruptcy and debt lawyer
Bankruptcy and debt lawyer
2012 - Present
Senior Attorney, John D Claudell Esq PC
2004 - 2012
Senior Attorney, Colonial Tax Consultants
2003 - 2004
Senior Associate, Omni Financial
2015 - Present
National Bar AssociationMember
2004 - Present
Colorado Bar AssociationMember
1999
Juris Docor
1996
Bachelor of Arts
N/A
English
Legal Answers
Legal Guides
How do I fill out my W-4 so that the max amount of taxes is being taken out?
18 Apr 2026
Is settlement money for wrongful termination taxable?
02 Apr 2026
A family member owes over $400,000 to irs. They own a 6th of a family home and land I live on.
08 Dec 2025