Business Details
Trusted Tax Attorney in Oklahoma City
Shannonhouse Law, P.L.L.C. has provided specialized legal representation in tax law and federal white collar crime defense for over four decades. Our practice focuses on resolving complex state and federal tax controversies, criminal tax investigations, and grand jury subpoena matters. With advanced education in taxation from New York University School of Law and an AV Preeminent rating from Martindale-Hubbell, we combine deep technical expertise with courtroom experience to protect clients' rights. Our founder, Joseph G. Shannonhouse, IV, has represented taxpayers before the IRS, Oklahoma Tax Commission, and federal courts including the Tenth Circuit Court of Appeals. We maintain active memberships in the Oklahoma County Bar Association, American Bar Association, and United States Tax Court bar.Our track record includes successful outcomes in tax litigation, estate tax planning, and white collar criminal defense. We publish regularly in legal journals including The Oklahoma Bar Journal to advance tax law understanding. Clients benefit from our focused expertise in navigating IRS audits, tax collection disputes, and criminal tax defense strategies. Our practice emphasizes proactive resolution of delinquent tax returns and voluntary disclosure programs. We serve individuals, businesses, and corporations facing complex tax law challenges in Oklahoma and federal jurisdictions.
Services
Tax Controversies
White Collar Defense
Grand Jury Subpoenas
Tax Audits
Criminal Tax Defense
Tax Litigation
Estate Tax Planning
Voluntary Disclosure Programs
IRS Negotiations
Federal Tax Appeals
Highlights and features
- We have over 40 years of experience in federal tax controversy resolution
- Our attorney holds an LL.M. in Taxation from NYU Law School
- We maintain active bar admissions in multiple federal courts
- Our practice focuses exclusively on tax law and related criminal defense
- We are listed in the Bar Register of Preeminent Lawyers for Tax Law
Associations and certifications
- Martindale-Hubbell AV Preeminent
Services
Tax Controversies
We resolve complex tax disputes with the IRS and Oklahoma Tax Commission through audits, appeals, and litigation. Our practice handles unfiled returns, collection defense, and tax penalty abatement. Clients receive strategic representation to minimize financial exposure and protect legal rights in state and federal tax matters.
White Collar Defense
Our federal criminal defense focuses on tax fraud, evasion, and related white collar offenses. We represent clients during investigations, grand jury proceedings, and trials. The practice combines tax law expertise with criminal defense strategy to challenge allegations of financial misconduct and protect clients' futures.
Grand Jury Subpoenas
We provide critical legal support for grand jury subpoenas issued during tax crime investigations. Our representation includes pre-testimony strategy, response preparation, and rights protection during IRS Criminal Investigation Division proceedings. We help clients navigate federal subpoena compliance and potential criminal exposure.
Tax Audits
Our audit defense covers examination of tax returns by IRS and state authorities. We handle document requests, agent communications, and dispute resolution for individual and business taxpayers. The goal is to prevent audit findings from escalating to criminal investigations or substantial tax liabilities.
Tax Litigation
We litigate contested tax matters in United States Tax Court and federal district courts. Our litigation practice addresses disputed assessments, collection due process hearings, and constitutional challenges to tax enforcement. We combine courtroom experience with technical tax knowledge to achieve favorable judicial outcomes.
People
Joseph G. Shannonhouse, IV
Attorney and Counselor at Law
Oklahoma tax attorney with 40+ years of experience in federal tax controversies and white collar defense. Graduated University of Oklahoma Law School (1970) and NYU Law School (LL.M. Taxation, 1972). AV Preeminent rated by Martindale-Hubbell and listed in Bar Register of Preeminent Lawyers.
Questions
What constitutes tax evasion under federal law?
Tax evasion involves intentional underreporting of income, false deductions, or failure to file returns. Examples include unreported cash income, inflated charitable contributions, or falsified estate valuations.
Can I have legal representation during a grand jury subpoena?
While attorneys can't be present in the grand jury room, you may consult with counsel outside the room before answering questions during federal investigations.
When should I hire a tax attorney for IRS issues?
Engage a tax attorney immediately if facing fraud investigations, complex audits, large tax deficiencies, or criminal tax allegations to protect your legal rights.
How do white collar tax crimes differ from civil violations?
White collar tax crimes involve criminal intent to defraud, including tax evasion and fraudulent returns, while civil violations typically address unintentional errors with financial penalties but no criminal exposure.
What happens if I haven't filed tax returns for multiple years?
Failure to file creates potential criminal exposure and compounding penalties. Our firm helps clients resolve delinquent returns through voluntary disclosure programs and IRS negotiation strategies.
How does federal tax crime prosecution work?
Federal tax crimes are investigated by IRS Criminal Investigation Division and prosecuted by U.S. Attorneys. Convictions may result in fines, restitution, and prison sentences for offenses like tax fraud and evasion.
