Looking for the Best Tax Attorney in Denver?

Look No Further.

Denver Tax Attorney

Serving Clients throughout Colorado

Our Tax Lawyers Have the Experience, Knowledge, Skill and Reputation You Want in an Attorney: 

Our Tax Attorney Used To Work For the IRS

A Fair & Honest Attorney!




 "Could not have been more pleased on my tax dilemma.


The IRS sent me a back tax notice of $122,000 from my fathers Estate Sale. Within six weeks...it (was) resolved with no money due to the IRS.


He is honest, fair and most of all, I saw no dollar signs in his eyes when

dealing with this tax attorney. "


- Gary 

Tax client,


For The Most Experienced, Trusted Tax Advice, Contact Our Denver Tax Attorneys.

  • Our Tax Attorney Has Extensive Tax Experience, Including Working For The IRS.

  • We Are An Award-Winning, Nationally-Recognized Law Firm.

  • We Are Published Authors.

  • We Teach CLEs To Other Attorneys.


You can never be too careful when it comes to taxes, IRS audits and disputes. If you’re looking for solutions to your tax problems, overwhelmed by tax debt, facing an IRS audit, IRS investigation or have questions addressing related tax matters and tax issues, our tax law attorneys can provide you with the guidance and the representation you need.

Gantenbein Law Firm offers a unique, tough-minded, practical tax and business solutions. Whether you’re an individual, or a business, you need one of the best tax attorneys in Denver; a tax lawyer with an expert reputation, skill, knowledge and experience. You need a tax lawyer who understands your needs in the full context of your facts and circumstances. You need a Colorado tax law firm who is responsive and will get you results. Our tax attorneys, located in Denver, hold leading positions in the tax law community. You need tax law attorneys who are widely-known to be leaders in the industry. You need a tax attorney that has extensive tax experience and knowledge gained from working for the IRS. We are that team.



Our Denver Tax Attorneys are Skilled.

  • Our Tax Law Attorneys Are Cost-Efficient.

  • Our Tax Lawyers Are Effective.

  • Our Clients Love Us, But No One Wants an Attorney Forever. We Know How To Weigh Cost Versus Value So You Can Move On With Your Life. 

  • We Are Results-Driven. 



Our tax law attorneys can help solve your tax problems so you can take your life and business back. Our clients get the added peace of mind, knowing when they retain our firm, we talk to the IRS for you – so you don’t have to. We have the experience dealing with the IRS quickly and efficiently to get your life back on track.


When you work with our law firm - located in Denver and serving clients throughout Colorado - you get more than just tax attorney representation, you have our entire team behind you, including our experience in estate planning, probate, asset protection and life care planning. These areas interrelate and overlap - we’re here to ensure you have the help you require and can depend on.


Our firm is well versed with the different alternatives available to you. Your first step is to call and set up an appointment to discuss your issues. We handle Federal and State taxes, tax litigation, IRS audits, general business and corporation law, criminal tax, civil tax, tax negotiations, tax liens and all tax-related issues. One of the top tax attorneys in Colorado, our Denver tax audit lawyer can help.


There are various benefits to hiring our attorneys to represent you. Our tax law attorneys afford you certain rights and privileges that only come with legal representation. You are protected by the Attorney-Client Privilege, any and all communication between you and your attorney is confidential and can not be divulged to anyone, including the IRS.


Make sure you have the experienced, dedicated legal counsel you need in the face of any tax issue. Our ultimate goal is to ensure our clients are confident and secure in all their tax law matters.





City Park

1760 Gaylord Street

Denver, CO 80206





Or, for your ease and convenience, you can schedule your consultation online.


Talk to our attorneys and discover the best options for your case.

IRS tax attorneys in Denver, Colorado



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Our Denver Tax Lawyers Have an Excellent Reputation.

  • Check Out Our Testimonials: Our Clients Love Us. Because We Work Hard For Our Clients- And It Shows.

  • Want More Proof? Check Out Our Google Plus Page.

  • Ask Around.  Ask Judges, Other Attorneys, Your Friends: We Are Known To Be Leaders In The Industry. 

  • We Are Consistently Asked To Teach Other Attorneys And Write Legal Publications.



Other law firms may have flashier marketing or bigger staff - but our tax attorneys have a perfect reputation because our lawyers are experienced, knowledgeable and effective. 


It is important to consult with an experienced tax attorney you can trust. You want the best tax lawyers for your case. 

Our Denver tax lawyers are known as leaders in the tax industry- representing both individual and business clients with their tax needs and controversies, accomplishing the best resolution for the case. Our tax law attorneys are well-versed in an array of complicated tax law issues, and work efficiently and diligently to secure the best possible outcome in a case. They expertly understand both the procedural and substantive tax laws necessary for successful resolution in tax cases.

Our Denver IRS Tax Lawyers Are Knowledgeable.

  • We Are Smart.

  • We Teach Legal Classes.

  • We Write Legal Publications.

  • We Know The Answers. 



The tax lawyers at Gantenbein Law Firm in Denver are experienced lawyers in a wide array of complicated IRS tax matters. This experience is beneficial to our clients who are facing serious tax issues, owe back taxes, need the best tax advice, or simply want to save money via our tax lawyers' expert tax planning for businesses and individuals.


An experienced IRS tax lawyer is the most powerful negotiator who will construct the finest, supporting legal arguments for your tax case.  The best tax law attorney will use the court system, law and tax codes to provide the leverage you need in resolving your tax issue and is the only authority experienced in working cases with the IRS.


Being under the IRS collection process is stressful and can be downright dangerous. If given the wrong advice, you can end up in a very costly situation that can ruin your entire financial future.


We have the answers.


If you think your tax issue could reach higher levels, are under any kind of IRS investigation, or you are in need of protected advice, contact our Denver tax lawyers for your best options.


Come see for yourself: set up a consultation of your case. Bring all your tax questions - bring your hardest tax questions! Gantenbein Law Firm's IRS lawyers are among the very best in Denver and we are confident we can answer your Federal, State or Local tax issues on your case.


If you need a tax attorney in Denver, or throughout Colorado, contact our office at 303-618-2122.





  • Your attorney wants the best for your case, not just what will increase his/her billing in your case;


  • Your attorney understands complicated tax issues. Come prepared with a list of complicated tax questions. If your tax attorney does not know the answer during your consultation, be open to consulting with other tax attorneys;


  • Look for a tax attorney with a variety of publications, CLEs, or seminars under his/her belt. You want an attorney that is well-versed in tax law - not an attorney that is well-versed in marketing. The best attorneys are the ones that teach classes to the other local attorneys, or author publications for public knowledge or attorneys;


  • An ethical and professional attorney will never guarantee a result in your case. You can not predict how judges will rule, or know facts that have not yet been discovered that could affect your case. Be wary of an attorney that boasts he/she will definitely win;


  • Look for tax lawyers that are leaders in the industry, leaders of the Tax Bar or tax trade groups. This indicates an attorney that has been recognized by their peers as being amongst the best. 


Our Denver Tax Attorneys Practice In The Following Areas Of Tax Law:

  • Business & Employer Tax Issues (941)

  • IRS Tax Help

  • IRS Investigations

  • IRS Audit and Audit Representation

  • Criminal Investigation and Prosecution

  • Net Profits Tax Returns

  • Jeopardy Assessments

  • Termination Assessments

  • Offers in Compromise

  • Due Process Hearing for Collections

  • US Tax Court

  • Tax Liens & Levies

  • Garnishments

  • Unfiled Tax Returns

  • Tax Debt Settlement

  • IRS Penalties

  • IRS Letters

  • Appeals

  • Estate Taxes

  • Payroll Taxes

  • Trust Fund Taxes

  • Sales Taxes

  • Real Estate Taxes


Tax Law Tips Under the CARES Act 2020


President Trump passed the Coronavirus Aid, Relief and Economic Security (CARES) Act on March 27, 2020. Below you find information regarding tax deductions, tax credits and delayed tax liabilities under the CARES Act.


Loans for businesses and forbearances for mortgages under the CARES Acts can be found on our Business and Real Estate Law page, and forbearances for Student Loans may be found under our Credit Page.  


This information will be updated as it is amended.    


Tax Law Tips, Generally: 

  • April 15 Tax Return Deadline extended for 2019 tax returns. The new tax return deadline is July 15, 2020.

  • 1st Quarter estimated payments deadline extended. The new deadline for 1st Quarter estimated payments is July 15th, 2020. (rather confusingly, the deadline for 2nd Quarter estimated payments has NOT been extended and remains at June 15, 2020- before the deadline for 1st Quarter estimated payments.)

  • The CARES Act waives the 10% early withdrawal penalty on up to $100,000 of 401k or IRA distributions.

  • The CARES Act expanded deductions for charitable contributions  for non-itemizers.

  • We recommend to contest and appeal property taxes for 2021, as the value of properties will likely sharply decline following COVID. Property taxes are assessed every two years in Colorado, on odd numbered years, with a 1-month deadline to appeal (May 1-June 1).


Tax Law Tips for Individuals:

  • Each individual person is entitled to $1200 per person, and $500 per child. These rebates are not treated as income, but they are treated as an advance on your 2020 tax refund.

Tax Law Tips for Businesses:

  • Tax Credits against Employment Taxes 

    • Under the Employee Retention Credit, ​employers may take a fully refundable tax credit, up to 50% of qualified wages paid after March 12, 2020, and before January 1, 2021, including allocable qualified health plan expenses, that eligible employers pay their employees. The maximum credit for an Eligible Employer for qualified wages paid to any employee is $5,000. Eligible Employers, for the purposes of the Employee Retention Credit, are those that carry on a trade or business during calendar year 2020, including a tax-exempt organization, that either fully or partially suspends operation during any calendar quarter in 2020 due to orders from an appropriate governmental authority limiting commerce, travel, or group meetings (for commercial, social, religious, or other purposes) due to COVID, or experiences a significant decline in gross receipts during the calendar quarter. Business that take a PPP loan do not qualify for the Employee Retention Credit. 

  • Employer Payroll Tax Credit

    • Employers that pay for employees who take sick for family leave under the CARES Act are entitled to a fully taxable credit of those payments.

    • Specifically, the IRS states, "Eligible Employers are entitled to receive a credit in the full amount of the qualified sick leave wages and qualified family leave wages, plus allocable qualified health plan expenses and the employer’s share of Medicare tax, paid for leave during the period beginning April 1, 2020, and ending December 31, 2020.  The credit is allowed against the taxes imposed on employers by section 3111(a) of the Internal Revenue Code (the “Code”) (the Old-Age, Survivors, and Disability Insurance tax (social security tax)) and section 3221(a) of the Code (the Railroad Retirement Tax Act Tier 1 rate) on all wages and compensation paid to all employees.  If the amount of the credit exceeds the employer portion of these federal employment taxes, then the excess is treated as an over-payment and refunded to the employer under sections 6402(a) or 6413(a) of the Code.  The qualified sick leave wages and qualified family leave wages are not subject to the taxes imposed on employers by sections 3111(a) and 3221(a) of the Code and employers (other than those that are subject to the Railroad Retirement Tax Act) are entitled to an additional credit for the taxes on employers imposed by section 3111(b) of the Code (Hospital Insurance (Medicare tax)) on such wages."​

    • All businesses, regardless of size, are eligible for a refundable payroll tax credit, if it is demonstrable that there was a 50% decline in gross receipts compared to the same quarter in 2019. 

  • Delayed Payment of Social Security Taxes for Employers

    • Self-employed individuals and employers usually have to pay their 6.2 percent share towards Social Security taxes. ​This payment is still due, but deferred until January 1, 2021.

  • Change in Net Operating Losses 

    • Losses arising after 2017 could be carried forward indefinitely, but were previously limited to 80% of taxable income. Under the CARE Act, tax years 2018, 2019 and 2020 can be carried back five years with the 80% limitation being removed for 2021.​

    • After filing 2020 returns, taxpayers can amend previous returns to obtain a refund based on losses.​​

    • This change excludes net operating losses for all REITs.

  • Interest Deductions Change:

    • The CARES Act increased the amount of interest expense businesses are allowed to deduct on their tax returns. This increased the adjusted taxable income limitation from 30% to 50% for the 2019 and 2020 tax years. 

  • Modified Losses for Non-Corporate Tax Filers:

    • Previously losses by non-corporate taxpayer’s was limited to $250,000 ($500,000 married filing jointly) per year. The CARE act delays this provision until 2021.​​​​​​​


  • Accelerated AMT Tax Credits:

    • Accelerated refundable AMT tax credits to tax years 2018-2019 from the existing 2020 and 2021 years.

These sweeping changes in tax law will affect many deductions, credits and delays available to both individuals and businesses.  It will be crucial to many people to take as many of these credits and deductions as possible- to maximize every single credit and deduction and lower your tax liability to the absolute lowest extent possible,. Americans are suffering from staggering business losses and job losses- and the reduction of taxes and your tax liability is critical. 


If you have questions regarding tax planning for 2020 and beyond, contact our Denver tax attorneys immediately. Our tax attorneys are knowledgeable about the tax reform, the CARES Act and its many changes and are ready to assist you and your business with planning for, and complying with, the new tax changes. Our tax attorneys have their L.L.M in Tax law- the highest degree possible in taxation. Gantenbein Law Firm also has its own staff accounting manager- available only for its tax clients. Our staff accounting member has her L.L.M. and worked as the staff accounting manager for many large corporations, including large, national airline and real estate corporations. 

Tax Resources For Denver, Colorado & Federal IRS Resources

There are many tax resources that can help explain federal (IRS), state ( Colorado ), and city ( Denver and other metro cities) tax regulations, filing dates and addresses. We have provided those resources, below:

  • The Denver IRS tax office is located at 1999 Broadway Denver, CO 80202. Other Colorado IRS tax offices are located in Colorado Springs and Grand Junction. More information regarding these tax offices can be found here.

  • The Colorado State tax office is located in Denver at 1375 Sherman Street, 80203. The state tax office provides tax account registration, tax assistance and general information. Other state tax office locations are in Colorado Springs, Fort Collins, Grand Junction and Pueblo. Tax Auditing, tax compliance issues, business seizures and tax delinquency issues also occur at these offices. You can find more information regarding these state tax offices here.

  • For tax assessment and tax data for Denver properties, visit the City and County of Denver Property Records here.

  • Business tax information for businesses in Denver city and county can be found on the Denver government website here.

  • Other general and specific information regarding Colorado state taxes, including taxation on marijuana, liquor and tobacco, and state income tax forms can be found on the Colorado Department of Revenue website.

  • For federal IRS tax information, be sure to visit the IRS website. The website includes such information as information about your refund, forms and tax assistance, filing dates and more.

  • The United States tax courts are located in Denver at 1929 Stout Street, 80294. It is a federal trial court that hears matters related to federal IRS tax issues. If you have received a summons for tax court, it is best to contact our Denver, Colorado tax attorneys immediately for assistance. You can more information abut the United States tax courts here.

Gantenbein Law Firm's tax lawyers serve those with federal and state tax and IRS issues in Arvada, Aurora, Bailey, Bow Mar, Boulder, Brighton, Broomfield, Castle Rock, Castle Pines, Centennial, Chatfield, Cherry Hills, Columbine, Commerce City, Conifer, Denver, Edgewater, Elizabeth, Englewood, Evergreen, Federal Heights, Foxfield, Franktown, Genesee, Glendale, Golden, Greenwood Village, Henderson, Highlands Ranch, Idledale, Indian Hills, Ken Caryl Kittredge, Lafayette, Lakewood, Larkspur, Littleton, Lochbuie, Lone Tree, Louisville, Monument, Morrison, Northglenn, Parker, Pine, Roxborough, Sedalia, Sheridan, Southglenn, Thornton, Westminster, Wheat Ridge and throughout all of Colorado.

Gantenbein Law Firm's tax attorney is conveniently located in Denver and serves all of Colorado. To discuss the best options for your case, contact our Denver IRS Tax Lawyers by calling our offices at 303-618-2122.


Gantenbein Law Firm