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

IRS outlines AI risks, Circular 230 duties for tax practitioners
The IRS warned that AI’s risks — including fabricated outputs and data privacy concerns — require practitioners to verify results and follow existing Circular 230 rules on diligence, competence, and confidentiality.
Author: By Martha Waggoner
Posted: June 26, 2026, 12:58 pm
PCAOB seeks comment on standard-setting and research
The PCAOB seeks public comment on future areas of focus for standard setting, building on the dialogue initiated earlier this year.
Author: By Kevin Brewer
Posted: June 25, 2026, 8:12 pm
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