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Your Trusted Partner for Accounting and Tax Services
Vallas & Arrison provides expert tax and accounting services performed by certified public accountants with over 50 years of combined experience. We prioritize personalized client relationships, ensuring small businesses and individuals receive tailored financial guidance. Our approach combines innovation with meticulous attention to detail, offering year-round support for tax compliance, financial reporting, and IRS representation.

Clients consistently highlight our responsiveness, transparency in billing, and ability to simplify complex financial processes. Headquartered in Littleton, Massachusetts, we serve clients across Massachusetts and New Hampshire, maintaining a strong commitment to professional excellence and client satisfaction.
Services
Tax Services Accounting Services Audit Services Financial Reporting IRS Representation
Highlights and features
  • We offer over 50 years of combined experience in tax compliance and financial reporting.
  • Our team provides year-round availability for tax and accounting consultations.
  • We guarantee transparent billing with no unexpected charges.
  • Our certified public accountants deliver personalized service tailored to client needs.
  • We streamline accounting processes to reduce client stress and improve efficiency.
Associations and certifications
  • Certified Public Accountants (CPA)
What people say
Knowledgeable and experienced Responsive and sensitive to needs No surprises with billing Streamlined accounting processes Seasoned professional guidance
Services
Tax Services
Our tax services include comprehensive preparation and filing for individuals and businesses. We specialize in navigating complex tax codes to maximize refunds and minimize liabilities. Clients benefit from year-round support and IRS representation during audits.
Accounting Services
We provide tailored accounting solutions for small businesses, including bookkeeping, payroll processing, and financial statement preparation. Our services ensure accurate financial records and compliance with regulatory requirements while simplifying day-to-day financial operations.
Audit Services
Our audit services offer thorough examination of financial records to ensure accuracy and compliance. We work closely with clients to prepare for IRS audits, address discrepancies, and implement corrective measures to strengthen financial integrity.
Financial Reporting
We deliver detailed financial reporting to help businesses track performance and make informed decisions. Services include balance sheets, income statements, and cash flow analysis tailored to client-specific needs and industry standards.
IRS Representation
Our IRS representation service provides expert guidance during tax audits. We handle all communications with tax authorities, ensuring clients receive fair treatment while resolving disputes efficiently and minimizing potential penalties.
People
Thom Arrison
Certified Public Accountant
Thom Arrison is a seasoned CPA with over 20 years of experience in tax preparation and financial consulting. He specializes in small business accounting and IRS audit representation, prioritizing client education and financial clarity.
Questions
What tax services do you offer?
We provide individual and business tax preparation, IRS audit representation, and year-round tax planning to optimize financial outcomes.
Do you serve businesses outside Massachusetts?
Yes, we serve clients across Massachusetts and New Hampshire with both in-person and remote accounting solutions.
How do you handle IRS audit support?
Our team manages all IRS communications, explains audit requirements clearly, and works to resolve issues efficiently with minimal client involvement.
Are your accounting services available year-round?
Yes, we provide ongoing accounting support including bookkeeping, payroll processing, and financial reporting throughout the year.
What sets you apart from other accountants?
We combine decades of experience with personalized service, transparent billing, and proactive financial guidance tailored to each client's unique needs.