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

GAO tax fraud estimate puts annual losses at up to $304 billion
A first-of-its-kind GAO analysis estimates annual federal tax fraud losses at $116 billion to $304 billion. The report said that the IRS needs a coordinated antifraud strategy. The IRS partially agreed with the recommendations but disputed aspects of the report's methodology.
Author: By Martha Waggoner
Posted: September 29, 2026, 7:55 pm
IRS launches mobile app with expanded account access
After 15 years as IRS2Go, the IRS’s taxpayer app now offers expanded access to account services under a new name. The IRS said it expects to add more capabilities to the app over time.
Author: By Martha Waggoner
Posted: September 28, 2026, 2:52 pm
Identity theft victims waited 20 months for IRS case resolution
A TIGTA report found that IRS delays in resolving identity theft cases cost the government $124.2 million in refund interest from fiscal years 2023 through 2025. The findings echo warnings from National Taxpayer Advocate Erin Collins, who has called the wait times “unconscionable.”
Author: By Martha Waggoner
Posted: September 25, 2026, 6:42 pm