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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 11 - 15 of 16 reviews | Practice Area Knowledge
Posted by Stephen Kriss | July 28, 2016 | Tax
OIC My Tax Break
Signed up for John's program My Tax Break which allows one to file an Offer in Compromise relative owed IRS tax liability. John relieved my anxiety and guided me through some questions which I could not find on instructions. If you are seeking a tax attorney with or without the program, contact John ...
Posted by Charlie | May 20, 2016 | Hired Attorney | Tax
If you owe the IRS, John is the man!
John made me feel comfortable right form the beginning of the process and handled everything with the IRS. I highly recommend John to anyone needing a tax attorney. Give him a call, you'll see why I feel the way I do.
Posted by anonymous | February 08, 2016 | Hired Attorney | Tax
Tax debt and unfiled returns
He is knowledgeable and professional and was able to discuss my long term issues with the IRS and resolve them. In such a stressful situation his competency and confidence made it so much easier. I would highly recommend him!
Posted by Darin | December 30, 2015 | Hired Attorney | Tax
Great attorney if dealing with IRS and back tax issues
John was amazing in helping us resolve our issues with the IRS. He was professional, knowledgeable, compassionate and treated my wife and I with respect. His price was more than reasonable and he was successful in obtaining a settlement with the IRS that we could manage. His expertise in dealing with...
Posted by JCS | August 21, 2015 | Hired Attorney | Tax
Attentive and Timely
I needed help in working with the IRS on back taxes. I had paid a huge amount to one of those big-name firms. My experience with that other firm was over a two year period and I never heard from them except when they wanted more money. That's when I hired John Claudell. John was a godsend! He r...
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