Mission San Juan Capistrano at golden hour — courtyard arches and bougainvillea
San Juan Capistrano · Since 2002

Experienced Tax Strategy When the Stakes Are High.

San Juan Financial helps South Orange County individuals and business owners plan proactively, navigate complicated tax matters, and respond confidently when the IRS becomes involved.

Enrolled Agent Team · Tax Planning · IRS Representation · San Juan Capistrano
Our Promise
“Plan intelligently when there is opportunity. Respond confidently when there is a problem.”

The experience required to resolve a tax problem can also help prevent one. San Juan Financial combines proactive planning, thorough preparation, and representation experience so clients can make informed decisions before and after tax complications arise.

Patti Kappen's private office — desk with legal portfolio and reading glasses in warm California light
Meet Patti

A former controller who chose taxpayer representation as her life’s work.

Patti Kappen built her early career inside businesses as a corporate controller, closing the books, managing cash, and translating financial reality into decisions owners could act on. That perspective still shapes how she approaches every return and every notice today.

Since becoming an Enrolled Agent in 2002 and completing training through the National Tax Practice Institute (NTPI), she has focused her practice on the areas where experience matters most: proactive planning for individuals and business owners, thorough preparation, and direct representation before the IRS and state agencies.

A past president of the California Society of Enrolled Agents and the local Orange County chapter, with prior service on the National Association of Enrolled Agents’ board, Patti’s work extends beyond her clients into the profession itself.

Meet the Team

Credentialed professionals with a long‑standing presence in Orange County.

View full team
Patricia “Patti” Kappen
Founder & Principal · EA, NTPI Fellow

Tax planning, representation, business advisory

Bill Stewart
Enrolled Agent · EA

Individual and small business tax preparation

Kim Mellinger-Cheng
Enrolled Agent · EA

Preparation and client review

Mark Pembrook
Client Services

Bookkeeping and QuickBooks support

Team roles and credentials shown as of publication. Please verify with the firm before relying on any specific professional’s scope of practice.

Professional Authority

Credentials that translate into practical experience for our clients.

Enrolled Agents are federally authorized tax professionals who may represent taxpayers before the IRS. The distinction matters most when a return becomes complicated or an agency becomes involved.

Enrolled Agent Authority

Federally authorized tax professionals who may represent taxpayers before the IRS on audits, collections, and appeals.

NTPI Training

Advanced representation training through the National Tax Practice Institute, focused on procedure and client advocacy.

Association Leadership

Prior state and local society presidencies and national board service inside the Enrolled Agent profession.

Representation Experience

Decades of direct experience working with taxpayers under examination, collection, and compliance pressure.

Tax Representation

A Tax Notice Is a Deadline — Not a Strategy.

When the IRS or a state agency writes, the first work is understanding the situation clearly. We begin by mapping what has happened, what is required, and what time you actually have to respond.

Agency involved
Tax years at issue
Notices received
Filing compliance
Amounts claimed
Collection activity
Documentation available
Statutory deadlines

We do not guarantee a particular resolution or imply that every taxpayer qualifies for an offer in compromise. Outcomes depend on facts, compliance history, and law.

Quiet Spanish colonial street in San Juan Capistrano at dawn
Military Tax Guidance

Original guidance for service members and their families.

Combat-zone extensions, residency and domicile questions, military pay exclusions, relocation and multistate filing, home sales, and reservist considerations — presented as guidance and a direct path to consultation, not a link farm.

Long-Term Client Trust

Relationships measured in decades, not tax seasons.

“More than fifteen years of steady, careful work — and thorough preparation when I was audited by the IRS.”

— Verified long-term client
20+
Years as an Enrolled Agent (Patti)
NTPI
Fellow — advanced representation training
OC
San Juan Capistrano office since inception
How It Works

Two clear pathways, depending on where you are today.

Proactive Clients
  1. 01
    Tax Strategy Review
  2. 02
    Financial and Tax Assessment
  3. 03
    Recommended Planning Priorities
  4. 04
    Preparation and Ongoing Guidance
Tax-Problem Clients
  1. 01
    Urgent Case Review
  2. 02
    Secure Notice and Document Collection
  3. 03
    Compliance and Resolution Assessment
  4. 04
    Representation and Status Updates
  5. 05
    Post-Resolution Planning
San Juan Capistrano

Plan Ahead — or Get a Clear Path Forward.

Whether you want a proactive tax strategy or need experienced help with a pressing IRS matter, our team is ready to review your situation and outline the next step.