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

Eligible taxpayers to get automatic IRS penalty relief
Under the new system, eligible taxpayers will no longer have to request penalty relief that the IRS says is routinely granted.
Author: By Martha Waggoner
Posted: July 8, 2026, 8:59 pm
Scam stoppers: 5 ways CPAs can help older clients fight financial fraud
More than 80% of attendees in a recent ENGAGE session reported they’ve had at least one client compromised by a financial scam. The presenter explains how CPAs can be “fraud gatekeepers” before, during, and after an incident.
Author: By Bryan Strickland
Posted: July 7, 2026, 6:32 pm
IRS adds online option, details for Kwong-related refund claims
Certain taxpayers with IRS online accounts can file a Kwong-related refund claim on Form 843 through a new secure application before a Friday deadline.
Author: By Martha Waggoner
Posted: July 6, 2026, 9:05 pm