4.9834 reviewsNow serving all of California
Tax help forSan Diego,online.
Biotech founders, defense contractors, and real estate investors across San Diego. Free online consultation with a senior advisor. No office visit, no drive, anywhere in San Diego County.
- “Best tax preparation service I have used. Mauricio really takes care of his clients.”Juan M.
- “Mauricio literally saved the day and was so accommodating to my last minute requests.”Christine H.
- “I don't know how I would do it without Mauricio and his team.”Rafael R.
- “Alondra is amazing! She took the time to explain everything to me in detail.”Valerie M.
- “Mauricio will educate you on how to save money on your taxes and do it RIGHT!”Chelsea J.
- “Thank you for your patience, expertise, and easygoing professionalism throughout tax season.”Danielle C.
- “Mauricio did an excellent job walking me through the tax filing process being a property owner.”Cynthia R.
- “Mauricio, is amazing! Very knowledgeable & professional.”Ron B.
- “Mauricio and his team is the Best in the tax industry!”Marisol V.
- “Professional, and easy place to get your taxes done!! Recommended.”Donald S.
- “I cant express how happy I am with Mauricio and his team.”Peter F.
- “Both Christian and Mauricio were great.”Javier P.
- “Mauricio did an amazing job helping us with our taxes.”Theresa B.
- “Mari was so knowledgeable.”Teresa
- “Mauricio and Alondra were of great help!”Drew
- “Mauricio and his team are amazing.”Lizbeth P.
- average rating from 834 reviews
- 4.9
- average rating from 834 reviews
- years resolving IRS and state matters
- 25+
- years resolving IRS and state matters
- in tax debt negotiated
- $12M+
- in tax debt negotiated
Does MM.TAX serve San Diego?
Yes. Our online team serves San Diego and the rest of San Diego County by phone and video, with secure document upload and e-signature, so there's no office visit. We handle IRS tax resolution, business and corporate tax returns, bookkeeping, and tax planning. Every engagement is a flat fee quoted in writing after a free 30-minute consult. Call (510) 319-1595.
Updated November 2026. Serving all of California online.
San Diego County
Tax help that knows San Diego business.
Much of our work in San Diego is with biotech, defense contractors, real estate. Those businesses share the same pressure points: uneven cash flow, payroll and sales tax exposure, and owners whose personal and business returns depend on each other.
We handle it all online. You talk to a senior advisor by phone or video, upload documents to a secure portal, and sign electronically. If the IRS or the Franchise Tax Board is involved, we file a power of attorney and take over the calls. Every engagement is a flat fee, quoted in writing first.
Services
What we handle for San Diego clients.
Areas we serve around San Diego.
All online, so distance doesn't matter.
- Downtown San Diego
- La Jolla
- Mission Valley
- North Park
- Kearny Mesa
- Chula Vista
The process
From first call to resolution.
- 01
Assess
We review your financial position, tax history, and goals before recommending anything.
- 02
Plan
A written strategy built around your structure and long-term goals, with a flat fee.
- 03
Execute
Bookkeeping, filing, and oversight, so you stay compliant all year.
- 04
Resolve
When the IRS or state makes contact, we handle it.
Online, statewide
Start online. From anywhere in California.
No office visit, no waiting room. Our online team handles everything by phone and video, with secure upload and e-signature.
- 01
Call or book
Talk to the online team today, or book a free 30-minute consult.
- 02
Upload and sign
Send documents securely and e-sign from your phone or computer.
- 03
We take it from here
We handle the work and the IRS, and keep you updated.
Most clients start with a call
Call nowThe online team answers your questions, looks at your situation, and books your free consult. English and Spanish.
In-person meetings with the owner are by appointment only, for complex or high-value matters, with a $250 consultation fee.
Client voices
What clients say.
Common questions.
Do you have an office in San Diego?
You don't need one. Clients in San Diego work with our online team by phone and video, with secure upload and e-signature. In-person meetings with the owner are by appointment only, for complex or high-value matters, with a $250 consultation fee.
What does the free consultation include?
30 minutes with a senior advisor to understand your situation, explain your options, and quote a flat fee. No obligation.
How much do your services cost?
Every engagement is a flat fee, quoted in writing after the consultation. No hourly billing.
Can you help with IRS levies, liens, or wage garnishments?
Yes. We file a power of attorney, contact the IRS on your behalf, and work to release levies and garnishments as quickly as your case allows.
Do you work with businesses or individuals?
Both. Many clients are business owners whose personal and business taxes are connected.
Do you work with biotech in San Diego?
Yes. We work with biotech, defense contractors, real estate across San Diego County, handling business returns, payroll and sales tax questions, bookkeeping, and IRS or Franchise Tax Board issues, all online.
Can you handle California Franchise Tax Board and EDD issues too?
Yes. We represent clients with the FTB and handle EDD payroll tax matters alongside any federal IRS case, so one team sees the whole picture.
Questions about your situation? Talk to the online team today.
Southern California
More cities we serve near San Diego.
Service area
Serving all of California online
Same team and same standards, wherever you are. No office visit needed.
Get started
Tax problems in San Diego? Let's talk.
A free 30-minute online consult with a senior advisor. No pressure.