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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
24 years | 625 cases
24 years | 15 cases
24 years | 10 cases
24 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.
Showing 1 - 5 of 24 client reviews from Avvo
Posted by Evelyn | April 17, 2024 | Hired Attorney
Excellent experience! Great Attorney he resolved all of my tax issues and his expertise was wonderful.
Posted by anonymous | November 14, 2022 | Consulted Attorney
Contacted John first thing on a Monday morning about a pressing issue related to excise and sales taxes here in Colorado. He swiftly engaged with insightful, sage and tempered counsel that enabled me to make time critical decisions on matters of considerable financial gravity. Based on this, I would ...
Posted by anonymous | September 19, 2022 | Hired Attorney
I hired John to help me complete some back taxes and negotiate their results with the IRS. John worked at my pace and spent the time to answer my questions and explain the steps we were taking while communicating with the IRS. We submitted an “Offer in Compromise” to both the Federal and the State le...
Posted by Lee | November 11, 2021 | Consulted Attorney
We had several difficult questions regarding real estate that only a tax attorney could answer. John responded expediently and went over all of our questions thoughtfully, explaining details about tax law that were extremely helpful. Going forward we are confident that the information he shared wi...
Posted by Tariq | July 16, 2021 | Hired Attorney
We are writing this letter for the benefit of those with unresolved IRS tax issues , those who need legal help-it is common knowledge that the correct selection of a lawyer has a positive or negative impact on the outcome of the tax case . We were faced with a...
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
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
Sold a raw piece of land in Massachusetts trying to figure out whether or not I owe capital gains
26 Jul 2025
Do I have a capital gains problem?
25 Jul 2025