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

CP53E notice tied to paper-check transition causes confusion
Taxpayers and practitioners are unsure whether the CP53E notices they have received are scams or simply sent in error, a confusion heightened by the inclusion of a QR code.
Author: By Martha Waggoner
Posted: May 8, 2026, 5:01 pm
IRS establishes program for rulings on significant issues
The IRS is reinstating the practice of issuing these letters in response to numerous informal comments from taxpayers and practitioners regarding the time required to process letter ruling requests and the scope of those requests.
Author: From staff reports
Posted: May 7, 2026, 5:42 pm
SEC proposes semiannual reporting option for public companies
The long-standing requirement that public companies file a quarterly report with the SEC could give way to the option of reporting either on a quarterly or semiannual basis.
Author: By Bryan Strickland
Posted: May 6, 2026, 12:47 pm