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 broadens Tax Pro Account for accounting firms and others
The update allows firms that serve larger numbers of taxpayers to manage centralized authorization file access, view client information, and streamline authorizations online.
Author: By Martha Waggoner
Posted: February 9, 2026, 9:53 pm
AICPA urges Treasury, IRS to simplify Sec. 951 documentation rules
The AICPA told Treasury that Notice 2025 75’s “determine and document” requirement is “ambiguous and potentially onerous” and urges replacing it with a simple safe harbor or eliminating it.
Author: By Martha Waggoner
Posted: February 9, 2026, 9:43 pm
Agentic AI is handling more finance work — but can CFOs trust it?
Accuracy concerns mean finance leaders still rely on their teams to validate AI outputs, even as agentic AI shows potential to free up more time for strategic work, according to a new report.
Author: By Bryan Strickland
Posted: February 9, 2026, 6:05 pm