Our experienced Boston tax attorneys work with:

Businesses

Companies and business owners come to us when they are involved in an IRS investigation, examination or proceeding. Hire a trusted business tax attorney in Boston today! Read More

Individuals/Estates

Our Boston tax attorneys represent individuals with Internal Revenue Service (IRS) and state tax controversies including audits, collections, liens, seizures and offers in compromise. Read More

Voluntary Disclosure/
Offshore Assets

We represent taxpayers and resolve their foreign asset and income reporting problems. Learn more about what a tax attorney can do to help you with compliance, the Offshore Voluntary Disclosure Programs and FBAR. Read More


Contact McMahon & Tivnan today to inquire about representation from a skilled tax attorney in Boston! Our team offers extensive experience working with the IRS and resolving audits, appeals, litigation, and other matters involving tax disputes.
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IRS issues Filing and Payment Deadlines Questions and Answers with respect to the relief granted under Notice 2020-18

Overview: In response to the ongoing COVID-19 emergency, on March 21, 2020, the Internal Revenue Service (IRS) issued Notice 2020-18, extending the Federal income tax return filing and payment deadline to July

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Testimonials

  • Sean convinced IRS Appeals to abate a penalty of over $500,000 for failure to declare an interest in a foreign trust. Prior to retaining McMahon & Tivnan, two large, national firms could not accomplish what they did.
    Retired U.S. executive living in Europe
  • McMahon & Tivnan helped me through a difficult income tax examination. Sean convinced IRS that no serious penalties should be assessed despite the numerous errors committed by the companies’ prior accountants.
    Boston-area business owner