Hallisey & D’Agostino, LLP is a full-service public accounting firm offering a wide array of accounting, tax, and advisory services to individuals and small to mid-size closely-held businesses located throughout Connecticut and the surrounding areas.

Accounting & Assurance

Whether it’s assisting with routine bookkeeping issues or advising on a complex transaction during an audit, we have the skills and resources necessary to help you produce accurate, high-quality and timely financial information.

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Tax

Tax laws and regulations are in a constant state of flux and we recognize that in addition to experience, staying up-to-date on current developments is critical in creating a comprehensive tax strategy.

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Business Advisory

From start-ups to established enterprises, businesses at every phase need sound advice to navigate operational challenges, succession planning, and an ever-changing regulatory landscape.

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Individuals

Achieving your financial goals and ultimately a secure retirement requires discipline and the right mix of personalized wealth accumulation and preservation strategies, including tax minimization and trust & estate planning.

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Tax, accounting, auditing news - Journal of Accountancy

Advocate: IRS had strong filing season for online taxpayers, weaker one for others
The national taxpayer advocate’s Fiscal Year 2027 Objectives Report to Congress says the IRS processed about 139 million returns and handled most refunds smoothly but says the story was different for taxpayers who needed help from a human being.
Author: By Martha Waggoner
Posted: June 25, 2026, 2:51 pm
Supreme Court lets stand IRS power to assess tax anytime for preparer fraud
The Supreme Court declined to hear an appeal of the Third Circuit’s decision in Murrin, in which the court held that taxpayer intent is not required for the unlimited period for assessing tax under Sec. 6501(c)(1) to apply.
Author: By Martha Waggoner
Posted: June 24, 2026, 7:18 pm
AICPA Top Issues Survey: Firms’ focus on technology rises
Larger firms participating in the biennial Private Companies Practice Section survey also are grappling with people-related issues, and smaller firms highlighted regulatory and data security concerns.
Author: By Bryan Strickland
Posted: June 23, 2026, 8:31 pm