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

PEEC proposes revised definition of ‘attest engagement team’
The AICPA Professional Ethics Executive Committee seeks comment on a revised definition to gather input on whether the definition appropriately reflects the roles that should be excluded from an attest engagement team. The comment deadline is June 1.
Author: By Kelly D. Mullins
Posted: March 16, 2026, 12:30 pm
AICPA pushes IRS to ease and expand first‑time abatement rules
The recommendations include allowing taxpayers to rely on substitute reasonable cause when appropriate, permitting them to reserve the automatic first-time abatement for future use.
Author: By Martha Waggoner
Posted: March 16, 2026, 12:05 pm
US, Canada, Mexico extend CPA mobility agreement through 2028
The AICPA and the National Association of State Boards of Accountancy are among the group of entities reaffirming a smooth path for accounting professionals to practice across North American borders.
Author: By Bryan Strickland
Posted: March 10, 2026, 6:41 pm