Best Tax Firms

3 Companies - Rankings updated: April 01, 2026

Each agency undergoes DesignRush evaluation for professional expertise and genuine client satisfaction to assist your search. Some featured placements are paid.

United States × Connecticut × Hartford ×
  • Whittlesey is the largest regional CPA and IT consulting firm in New England. With offices in Hartford, CT, Hamden, CT, and Holyoke, MA, we provide a comprehensive array of advisory, assurance, tax, and technology services.  [... view Whittlesey profile ]
    Location
    Hartford, Connecticut
    Number of Employees
    100 - 249

    Whittlesey Services

    • Accounting
    • Business Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts

    Whittlesey Reviews & Testimonials

    • Sandra Smith
      Sandra Smith Review from Google
      1.0

      Sandra Smith's Review Sourced from Google

      I they do not care about their customers!I have been with them for over 40 years! I was just notified I was no longer wanted as a client.I called and text 3 people I knew there, asking why they were canceling my simple tax account.NO ANSWERES. Then a month later I got an email saying they were down sizing!Is this how you treat a loyal customer of over 40 years that does a simple tax return? I always relied on this company and the people in it. I feel so disrespected. I would never trust them again.

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    • Peter Keast, Sr.
      Peter Keast, Sr. Review from Google
      5.0

      Peter Keast, Sr.'s Review Sourced from Google

      Computer technology has vastly improved many of our lives, even in the non-profit world. The issues are cost, reliability and maintenance. It is too much for a small business owner to become an expert in these areas. I'm not even sure it is possible. Having a partner - a paid vendor, yes, but a still a partner that respects your budget, responds quickly to problems as they arrive, and proactively seeks to protect your network from crashes and malware is invaluable. We feel like we have that partner with Whittlesey Technologies. Every year we meet to discuss vendor agreements and performance. Whittlesey Technologies has never been considered for replacement. They are our partner.

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    • P Cado
      P Cado Review from Google
      5.0

      P Cado's Review Sourced from Google

      We have been using Whittlesey Technology as our service provider since the mid 2000’s. They have managed multiple server & software implementations over the years with ease while giving us the communication and proactive guidance we need. They have also provided very responsive day to day support. We look at Whittlesey as a trusted partner and part of our team.

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    Reviews verified by DesignRush and sourced from the agency's profile
    • The Motorlease Corporation
    • Virginia Industries
    • Guilford Savings Bank
    Data sourced from the agency's DesignRush profile
  • IT, Business, BPO, Audit, Tax and Advisory are just the beginning.

    Grant Thornton LLP (US) is an IT, project management, audit, tax, AgTech, and BPO company headquartered in Chicago, Illinois with over 50 U.S. offices and access to a global network or member firms in over 135 countries. We offer a broad range of services in strategy and consulting, operations, technology and  [... view Grant Thornton profile ]
    Location
    Hartford, Connecticut
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Grant Thornton Services

    • Accounting
    • Business Consulting
    • Market Research
    • HR Outsourcing
    • Software Development
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts

    Clients and Projects

    View Full Portfolio
    • Finance modernization for data-driven expansion
      Financial Accounting Project Finance modernization for data-driven expansion
    • A new procurement paradigm at BDTX
      Business Operations Consulting Project A new procurement paradigm at BDTX
    Comprehensive analysis done by DesignRush Agency Experts.

    Grant Thornton Reviews & Testimonials

    • Theodore Mall
      Theodore Mall Review from Google
      4.0

      Theodore Mall's Review Sourced from Google

      One of the world’s leading organizations of independent audit, tax and advisory firms. Grant Thornton has revenues in excess of $1.9 billion and operates more than 50 offices.

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    Reviews verified by DesignRush and sourced from the agency's profile
    • Financial industry
    • Real estate industry
    • Media and Entertainment industry
    Data sourced from the agency's DesignRush profile
  • Building A Better Working World

    EY offers Accounting, Business Consulting, and IT Services with a mission to build a better working world. It provides insights and quality services that instill trust in global capital markets and economies. EY focuses on developing exceptional leaders who deliver on their commitments to all stakeholders  [... view EY profile ]
    Location
    Hartford, Connecticut
    Number of Employees
    1000 & Up

    EY Services

    • Business Consulting
    • HR Outsourcing
    • Accounting
    • Cybersecurity
    • IT Services
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Qiagen
    • Apple
    • ASOS
    • Microsoft
    • Wawa
    Data sourced from the agency's DesignRush profile

Frequently Asked Questions

What is the difference between a tax preparation company and a CPA?

The main difference is scope. Tax preparation companies prepare and file returns, while Certified Public Accountants (CPAs) provide deeper financial guidance and long-term tax strategy. 

FactorTax preparation companyCPA
Main rolePrepares and files tax returnsProvides tax and financial expertise
ServicesTax return preparationTax planning, accounting, audits
TrainingVaries by preparerLicensed accounting professional
Complexity handledSimple to moderate tax preparationComplex taxes and business finances
RepresentationLimited ability with tax authoritiesCan represent clients
Typical clientsIndividuals, small businessesBusinesses, high-income individuals

How do tax firms typically charge?

Tax companies usually charge either a flat fee or an hourly rate. Most simple individual returns cost about $200 to $300, while more complex returns often run from $300 to $800. 

Pricing modelTypical costHow it worksBest for
Flat fee$200 to $300 for simple returnsOne set price for the returnSimple personal taxes
Flat fee for complex return$300 to $800Higher fixed price based on forms and complexity Itemized deductions, self-employment, investments 
Hourly rate$100 to $200You pay for the time spent on the workComplex or unclear cases
State return add-on$50 to $150Extra charge for filing state taxes Federal + state filling
Amendment or revision$50 to $300Extra charge to fix or update a filed returnCorrected returns

Tax companies usually raise prices when returns become more complex. Multiple income sources, self-employment, rental property, investments, and business filings all increase the cost. Large firms, CPAs, and firms in high-cost cities also tend to charge more. 

Can tax companies represent me in an audit?

No. Only certain licensed tax professionals can represent you in a tax audit. 

Professional Can represent you in an auditNotes
Certified Public Accountant (CPA) YesFull representation rights before the IRS
Enrolled Agent (EA) YesFederally licensed tax specialist
Tax attorneyYesHandles complex disputes and legal cases
Tax preparation companySometimesOnly if the preparer is a CPA or EA
Unlicensed tax preparerNoCannot represent clients before the IRS

Most tax companies prepare and file tax returns, but cannot represent clients during an audit unless they employ licensed professionals such as CPAs or Enrolled Agents. Only those credentials allow full representation before the IRS. 

Do best tax companies offer Identity Protection (IP) PINs?

No. Tax companies do not issue Identity Protection PINs. 

The IRS issues the Identity Protection PIN directly to taxpayers to prevent tax fraud and identity theft. Tax companies can help you request or manage the PIN during tax filing, but they cannot generate or assign one. 

The PIN is a six-digit code that must be included when filing a tax return. It confirms your identity and prevents someone else from filing a return using your Social Security number. 

What happens if a tax company has a data breach?

Tax preparation companies must report the breach, notify clients, and take steps to stop tax fraud. 

If a tax company experiences a data breach, federal rules require immediate action to protect taxpayer information and prevent fraudulent filings. 

Required actions include: 

  • Report the breach to the IRS to help block fraudulent tax returns linked to stolen taxpayer data. 
  • Notify state tax agencies and law enforcement, such as the FBI or Secret Service. 
  • Inform affected clients that their personal or financial information may be compromised. 
  • Investigate the breach by hiring cybersecurity or forensic experts to identify how the data was accessed and stop further exposure. 

Tax preparation firms must also follow the FTC Safeguards Rule, which requires them to maintain a written security plan that protects taxpayer data.Â