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

Taxpayers advised they can ignore CP53E notice — after verifying error
The IRS’s sending of about 1.4 million CP53E notices sparked concerns about errors and fraud. A release from the Taxpayer Advocate Service urged taxpayers to verify their accounts directly on IRS.gov.
Author: By Martha Waggoner
Posted: May 14, 2026, 6:40 pm
IRS announces terms of new conservation easement settlement opportunity
The terms of the new, time-limited settlement opportunity include the type and amount of deduction that eligible taxpayers will be allowed and the penalty rate that will apply.
Author: By James A. Beavers, CPA, CGMA, J.D., LL.M.
Posted: May 13, 2026, 9:03 pm
AI for CPAs: From efficiency tool to decision engine
Most global finance leaders in a new survey report that artificial intelligence is improving decision-making and forecast accuracy in the finance function, and organizations using agentic AI and those making sure AI is assurance-ready are seeing bigger gains.
Author: By Bryan Strickland
Posted: May 13, 2026, 8:10 pm