McMahon & Assoc. offers a wide array of tax services

Audits and examinations

McMahon & Associates defends taxpayers in IRS examinations of their returns.  The IRS selects returns for examination for a variety of reasons, but usually there is some indication that IRS suspects represents a filing problem.  Early intervention in an examination may prevent the matter from escalating and becoming a larger problem than it may have.  McMahon & Associates understands IRS examination techniques and can spot issues that may be problematic.

Collections, liens and seizures

McMahon & Associates fights levys, liens and siezures that IRS uses to collect unpaid tax liabilities.  Our many years of experience negotiating and litigating collection disputes with IRS enable us to reach the best payment terms possible and avoid involuntary seizure actions.

Offers in Compromise

The best option for a client who cannot fully pay their tax liability is often an Offer in Compromise.  Despite the message of frequent of late-night TV commercials, an Offer in Compromise program is not for everyone and there are many requirements that must be met to reach an agreement with IRS.  We can determine from an initial evaluation whether a client will qualify and what must be done to achieve success.

Voluntary Disclosure

The IRS general Voluntary Disclosure program encourages taxpayers who become aware of a tax compliance problem to come forward by promising lenient treatment in exchange for coming forward and reporting a problem of which IRS was unaware.  There is a special Offshore Voluntary Disclosure Program for reporting undisclosed offshore financial accounts.


IRS offers a quasi-independent review of IRS determinations before they become final or a taxpayer is required to go to court.  All of our senior professionals either worked in or with the IRS Appeals Office when we were with the IRS.  Our understanding of the rules and procedures of the IRS Appeals office enables us to achieve the best possible settlement offer from IRS before deciding if litigation is necessary.


Few firms can match the extensive tax litigation experience of McMahon & Associates.  If a tax dispute cannot be resolved administratively, litigation becomes the only option.  Our attorneys’ extensive experience in the U.S. Tax Court and Federal District Courts on tax matters ensures the clients interests are well represented.

Foreign bank accounts and FBAR requirements / Offshore Voluntary Disclosure Program

Reporting of foreign financial accounts and assets is becoming the focus of more IRS scrutiny.  Many professionals are either not familiar or comfortable with foreign asset reporting or knowledgeable about the possible problems of non-compliance.  We work with clients to resolve past filing issues and ensure correct compliance going forward.

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The information contained in the McMahon & Associates, PC web site is solely for informational purposes and does not create an attorney-client relationship or constitute legal advice. Unsolicited information transmitted electronically to our attorneys via this web site or the Internet is not considered confidential.

  • IRS to End Offshore Voluntary Disclosure Program March 13, 2018
    The Internal Revenue Service (IRS) announced on March 13, 2018 that it will be ending the Offshore Voluntary Disclosure Program (OVDP) on September 28, 2018. If you have an undisclosed foreign bank account, contact McMahon & Associates to learn how to come into compliance with the IRS. Learn more about OVDP here: IRS Offshore Voluntary […]
  • Sean McMahon Discusses Tax Trends and Challenges in Interview with Massachusetts Lawyers Weekly March 12, 2018
    In a recent interview with Massachusetts Lawyers Weekly In House Counsel, D. Sean McMahon discusses trends in tax law, challenges to the legal profession and how McMahon & Associates assists taxpayers. After leaving the Internal Revenue Service Chief Counsel’s Office in 2005, D. Sean McMahon opened the doors of McMahon Tax Law in Boston. Today, […]