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    San Francisco-Oakland Bay Bridge at blue hour twilightDiverse Bay Area business team collaborating in a bright modern officeModern glass high-rise office towers in a California business district
    San Francisco-Oakland Bay Bridge at blue hour twilightDiverse Bay Area business team collaborating in a bright modern officeModern glass high-rise office towers in a California business district

    Serving Concord, CA

    Expert tax help for Concord, CA.

    Concord businesses from Monument Boulevard to downtown need reliable tax help — bookkeeping, returns, and IRS resolution. Our online team brings 25 years of Bay Area experience to your screen.

    Free consultation · 100% virtual · Senior advisors

    Call Us

    Serving Concord, CA

    Expert tax help for Concord, CA.

    Concord businesses from Monument Boulevard to downtown need reliable tax help — bookkeeping, returns, and IRS resolution. Our online team brings 25 years of Bay Area experience to your screen.

    Free consultation · 100% virtual · Senior advisors

    Call Us
    IRS Tax ResolutionCorporate Tax ReturnsBookkeepingFree Virtual Consultation
    MM Online Tax Services

    Trusted by 800+ Clients

    A 25-year Bay Area practice, now serving Concord, CA online.

    The same senior advisors, the same proven process, the same results — delivered virtually so location is never a barrier.

    800+Verified reviews
    4.9★Average rating
    25+Years of experience
    $12M+Tax debt negotiated
    MM Online Tax Services

    What We Handle

    High-ticket tax services for Concord, CA businesses.

    We focus on the engagements that move the needle — IRS resolution, corporate returns, and bookkeeping that keeps your business audit-ready all year.

    IRS Tax Resolution

    Levies, liens, audits, back taxes, and unfiled returns resolved by senior advisors who negotiate with the IRS on your behalf. $12M+ negotiated.

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    Corporate Tax Returns

    Accurate, on-time corporate returns — S-corp, C-corp, LLC, and partnership filings that minimize your tax and keep you compliant.

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    Bookkeeping

    Monthly reconciliation, categorization, and month-end close that keep your books accurate and your decisions informed all year.

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    Estate & Trust Tax

    Fiduciary returns, estate tax strategy, and trust preparation that protects what your family built and passes it on efficiently.

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    Business Advisory

    Growth, cash flow, and exit planning that turns your numbers into a roadmap. Decisions made with clarity, not guesswork.

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    Entity Structuring

    LLC, S-corp, or holding structure chosen for your real numbers. Formation, documents, and ongoing optimization.

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    MM Online Tax Services

    Areas We Serve

    Serving Concord and the surrounding Bay Area area.

    Because we work with clients virtually, we help businesses and individuals across Bay Area — not just one zip code.

    Pleasant HillMartinezClaytonWalnut Creek
    MM Online Tax Services

    How It Works

    From first call to resolution in four steps.

    A clear, predictable process. You always know what is happening and what comes next.

    01

    Free Consultation

    A 30-minute call with a senior advisor. We review your situation — IRS problem, corporate return, or books behind — and tell you honestly what we would do. No pressure, no obligation.

    02

    Engagement & Onboarding

    If we are the right fit, we send a clear scope and flat-fee quote. You sign electronically, upload your documents through our secure portal, and we get to work.

    03

    Resolution & Filing

    We take over. For resolution, we handle all IRS communication. For returns and bookkeeping, we prepare and review everything before it touches your signature.

    04

    Ongoing Partnership

    Most clients stay with us year-round. We keep your books current, your returns filed, and your strategy ahead of the curve — so tax season is never a crisis.

    MM Online Tax Services

    Concord, CA Clients · 4.9 Stars

    What clients in Concord, CA say about MM.TAX.

    Pulled live from Google and Yelp. These are real reviews from businesses and individuals who trusted us with their tax resolution, returns, and books.

    4.9from 834 verified reviews
    BD
    Brunieh D.
    Google
    Verified
    I’ve been coming here for years. Geovanna helps me out and she is so amazing. She takes her time and explains this complex tax issues and makes it so much simpler for me to understand.
    CH
    Christine H.
    Yelp
    Verified
    I came to Mauricio after I felt like my last accountant wasn't up to par. Mauricio literally saved the day and was so accommodating to my last minute requests. He did my taxes within 1 day and saved m...
    CA
    Caio A.
    Google
    Verified
    Mauricio and the team are the real deal. The team brings a wealth of knowledge with professionalism, charisma, and care. I'm glad I've brought my personal and business taxes and tax planning here.
    AJ
    Alex J.
    Google
    Verified
    It seems like I will be the first one who will rate them below 5 star! There is a reason behind it! After driving to their offices 2 times because you can not reach them by phone! Sending them emails...
    DC
    Danielle C.
    Google
    Verified
    Jose Delgado, thank you for your patience, expertise, and easygoing professionalism throughout tax season. You made the process feel smooth and reassuring, and your guidance has had a HUGELY meaningfu...
    JF
    Jennifer F.
    Google
    Verified
    Cristian, was so helpful as a first time customer will be coming back to him next year!
    SG
    Simon G.
    Yelp
    Verified
    Honor your appointments. You made me wait 20+ minutes on an appointment. You wasted my time
    VC
    Vanessa C.
    Google
    Verified
    Cristian was awesome to work with!!! Definitely worth the wait and coming back next year. I was so scared thinking I was going to have to owe money this year, but when he turned his monitor to show me...
    RS
    Ricky S.
    Google
    Verified
    Excellent service and very Friendly!
    SS
    Sal S.
    Google
    Verified
    My wife and I had a great experience working with Mauricio Midence on our joint taxes this year. They were incredibly easy to work with — friendly, approachable, and made the whole process stress-free...
    FL
    Freddy L.
    Google
    Verified
    Christian at Mauricio Midence Tax Preparation provided excellent customer service. He was very informative, patient, and made the entire process smooth and stress-free. Highly recommend!
    MV
    MARISOL V.
    Google
    Verified
    Mauricio and his team is the Best in the tax industry! Highly appreciate them for always looking out for me and my business. Always gets it done and I have referred multiple complex clients to him and...
    BD
    Brunieh D.
    Google
    Verified
    I’ve been coming here for years. Geovanna helps me out and she is so amazing. She takes her time and explains this complex tax issues and makes it so much simpler for me to understand.
    CH
    Christine H.
    Yelp
    Verified
    I came to Mauricio after I felt like my last accountant wasn't up to par. Mauricio literally saved the day and was so accommodating to my last minute requests. He did my taxes within 1 day and saved m...
    CA
    Caio A.
    Google
    Verified
    Mauricio and the team are the real deal. The team brings a wealth of knowledge with professionalism, charisma, and care. I'm glad I've brought my personal and business taxes and tax planning here.
    AJ
    Alex J.
    Google
    Verified
    It seems like I will be the first one who will rate them below 5 star! There is a reason behind it! After driving to their offices 2 times because you can not reach them by phone! Sending them emails...
    DC
    Danielle C.
    Google
    Verified
    Jose Delgado, thank you for your patience, expertise, and easygoing professionalism throughout tax season. You made the process feel smooth and reassuring, and your guidance has had a HUGELY meaningfu...
    JF
    Jennifer F.
    Google
    Verified
    Cristian, was so helpful as a first time customer will be coming back to him next year!
    SG
    Simon G.
    Yelp
    Verified
    Honor your appointments. You made me wait 20+ minutes on an appointment. You wasted my time
    VC
    Vanessa C.
    Google
    Verified
    Cristian was awesome to work with!!! Definitely worth the wait and coming back next year. I was so scared thinking I was going to have to owe money this year, but when he turned his monitor to show me...
    RS
    Ricky S.
    Google
    Verified
    Excellent service and very Friendly!
    SS
    Sal S.
    Google
    Verified
    My wife and I had a great experience working with Mauricio Midence on our joint taxes this year. They were incredibly easy to work with — friendly, approachable, and made the whole process stress-free...
    FL
    Freddy L.
    Google
    Verified
    Christian at Mauricio Midence Tax Preparation provided excellent customer service. He was very informative, patient, and made the entire process smooth and stress-free. Highly recommend!
    MV
    MARISOL V.
    Google
    Verified
    Mauricio and his team is the Best in the tax industry! Highly appreciate them for always looking out for me and my business. Always gets it done and I have referred multiple complex clients to him and...
    PG
    Perla G.
    Google
    Verified
    Just came in for a review to go over my taxes and opening up a new company. Highly recommend this place.
    VF
    Vaillen F.
    Yelp
    Verified
    Mauricio was great! Needed him to deal with Oakland Tax Officers. Contacted him on a Thursday. Got a quote on Friday. Two weeks later, all paperwork in and done. Highly Recommended
    RR
    Rafael R.
    Google
    Verified
    I wouldn’t operate three different businesses. I don’t know how I would do it without Mauricio and his team. They helped me with payroll bookkeeping and making sure all my corporate filings are up-to-...
    KL
    Kim L.
    Yelp
    Verified
    No one likes to do their taxes. Especially if you owe money. I reached out to Mauricio Midence tax preparation services to review my completed return. I had a great experience working with Geovanna an...
    DS
    Donald S.
    Google
    Verified
    Professional, and easy place to get your taxes done!! Recommended.
    OP
    Oz P.
    Google
    Verified
    Absolutely amazing! I recommend this place to everyone. I was attended by Christian. He was extremely helpful and professional. He answered every question i had and made the process very easy. The atm...
    CR
    Cynthia R.
    Google
    Verified
    Went today to file my taxes, I’m a first time home owner and did not know what to expect. Mauricio did an excellent job walking me through the tax filing process being a property owner. He went above...
    SL
    Swetha L.
    Google
    Verified
    Love the service. Very friendly
    LL
    Leah G.
    Google
    Verified
    Super knowledgeable and helpful—I’m a loyal customer for almost 10 years. Plus they play the 90’s salsa jams!
    RJ
    Rivera
    Google
    Verified
    Muy buen servicio y confiable por parte de Cristian, me ayudó muchísimo con mis taxes de manera rápida y clara✨
    LC
    Leandro C.
    Google
    Verified
    This is a great place to get help for your taxes. Services is great everyone’s friendly and welcoming. 10/10
    EC
    Erica C.
    Google
    Verified
    Quick and easy. Trustworthy. I’ve been coming here for over 5 years.
    PG
    Perla G.
    Google
    Verified
    Just came in for a review to go over my taxes and opening up a new company. Highly recommend this place.
    VF
    Vaillen F.
    Yelp
    Verified
    Mauricio was great! Needed him to deal with Oakland Tax Officers. Contacted him on a Thursday. Got a quote on Friday. Two weeks later, all paperwork in and done. Highly Recommended
    RR
    Rafael R.
    Google
    Verified
    I wouldn’t operate three different businesses. I don’t know how I would do it without Mauricio and his team. They helped me with payroll bookkeeping and making sure all my corporate filings are up-to-...
    KL
    Kim L.
    Yelp
    Verified
    No one likes to do their taxes. Especially if you owe money. I reached out to Mauricio Midence tax preparation services to review my completed return. I had a great experience working with Geovanna an...
    DS
    Donald S.
    Google
    Verified
    Professional, and easy place to get your taxes done!! Recommended.
    OP
    Oz P.
    Google
    Verified
    Absolutely amazing! I recommend this place to everyone. I was attended by Christian. He was extremely helpful and professional. He answered every question i had and made the process very easy. The atm...
    CR
    Cynthia R.
    Google
    Verified
    Went today to file my taxes, I’m a first time home owner and did not know what to expect. Mauricio did an excellent job walking me through the tax filing process being a property owner. He went above...
    SL
    Swetha L.
    Google
    Verified
    Love the service. Very friendly
    LL
    Leah G.
    Google
    Verified
    Super knowledgeable and helpful—I’m a loyal customer for almost 10 years. Plus they play the 90’s salsa jams!
    RJ
    Rivera
    Google
    Verified
    Muy buen servicio y confiable por parte de Cristian, me ayudó muchísimo con mis taxes de manera rápida y clara✨
    LC
    Leandro C.
    Google
    Verified
    This is a great place to get help for your taxes. Services is great everyone’s friendly and welcoming. 10/10
    EC
    Erica C.
    Google
    Verified
    Quick and easy. Trustworthy. I’ve been coming here for over 5 years.
    Read all 834 reviews
    MM Online Tax Services

    Common Questions

    Questions from Concord, CA clients.

    San Francisco Bay at sunset with the Golden Gate Bridge in the distance
    Free Virtual Consultation

    Tax problems in Concord, CA? Let's talk.

    A 30-minute call with a senior advisor. Tell us what is going on — we will tell you what to do next. Free, virtual, and no pressure.

    Or call our online team