Welcome to One Accounting Tax®, Inc.

Practical Tax Help for Individuals and Family-Owned Businesses

When you need your taxes done correctly, and done without unnecessary complications, you want a firm that values efficiency, experience, and clear communication.

Serving Quincy, Braintree, and surrounding Massachusetts communities, One Accounting Tax®, Inc. specializes in tax preparation, payroll services, and back tax resolution for individuals and family-owned businesses. Whether you need a straightforward 1040 return, help catching up on prior-year filings, or support resolving IRS back taxes, his focus is on getting the job done accurately and professionally.

Founder Yi Chen is an Enrolled Agent (EA), federally authorized to represent taxpayers before the IRS. With more than a decade of experience — alongside a business partner who also brings over ten years in the field — One Accounting Tax®, Inc. has developed particular expertise working with small, family-operated businesses.

Our Team

  • Yi Chen

    Yi Chen, EA

    Founder & Tax Advisor

    Yi began his tax and accounting career in 2007 at a Boston-area CPA firm and later helped manage firm operations and staff. With nearly 20 years of experience, he works with individuals and small business owners to deliver accurate tax filings and practical, year-round advisory support.

    His background also includes experience at a major investment firm and a top global consulting firm, supporting most complex global tax matters. Yi combines corporate-level tax exposure with hands-on small business experience, plus deep real estate knowledge—having closed 100+ properties. This gives him a unique, real-world perspective on taxes for homeowners, landlords, and real estate investors.

    Credentials: Enrolled Agent (EA) • IRS Authorized e-file Provider • Bachelor’s Degree in Accounting • Associate Broker/Realtor

    Enrolled Agents are federally licensed and authorized to represent taxpayers before the IRS in all 50 states. Enrolled agent status is the highest credential the IRS awards. Like CPAs and attorneys, Enrolled Agents have unlimited rights to represent taxpayers before the IRS. Click here to see IRS definition of Enrolled Agent.

  • Yinnie Chen, EA

    Partner & Tax Advisor

    Yinnie brings nearly 20 years of accounting experience across public accounting and healthcare finance. She previously worked as an auditor at Grant Thornton LLP, developing deep expertise in financial reporting, compliance, and documentation standards.

    She has also served as a Financial Analyst and Senior Accountant for major hospitals, building a strong foundation in financial operations and controls. As an IRS Enrolled Agent (EA), Yinnie is authorized to represent taxpayers before the IRS and supports clients with tax, payroll, and compliance matters.

    Credentials: Enrolled Agent (EA) • Bachelor’s Degree in Accounting

  • Tricia Fu

    Payroll & Accountant

    Tricia Fu is a dedicated accountant at One Accounting Tax®, with a strong background in healthcare finance. She previously worked with Brigham and Women’s Hospital, Massachusetts General Hospital, and Harvard Medical School, where she supported complex financial operations.

    In her roles as a Senior Grants Manager, Tricia managed grant budgets, financial reporting, and payroll-related coordination. She brings a detail-focused approach and a high standard of documentation to support clients and the team year-round.

    Credentials: Master’s Degree in Communication/Marketing

What We Do

We provide focused, practical tax services, including:

  • Individual Tax Preparation (1040s)

  • Small Business Tax Preparation

  • Back Tax Filing & IRS Resolution

  • Payroll Services

  • Mortgage Loan Services

Many of our clients appreciate a streamlined process. When you’re ready to move forward, documents can be securely uploaded online — making the experience simple and efficient, especially during tax season.

Who We Serve

Our ideal clients include:

  • Family-owned businesses

  • Local small businesses

  • Individuals with straightforward tax needs

  • Taxpayers behind on prior-year filings

  • Clients seeking responsive, experienced representation

We are not a large-volume firm trying to upsell ongoing advisory contracts. We focus on high-quality tax preparation and resolution work for clients who value direct, experienced service.

Why Clients Choose Yi Chen

 • Enrolled Agent (EA) status with IRS representation authority
 • Over 10 years of tax experience (partner also with 10+ years)
 • Strong specialization in family-owned businesses
 • Efficient, no-nonsense process
 • Secure online document submission
 • Established presence in the Quincy and Braintree communities

Clients continue to choose Yi and his team even at a premium price point because they value experience, responsiveness, and results.

For individuals and small businesses seeking reliable tax preparation or back tax assistance in the South Shore Massachusetts area, One Accounting Tax®, Inc. provides steady guidance and practical solutions.

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