4.9834 reviewsNow serving all of California
Corporatereturns, filedright.
Full-charge accounting, financial statements, and a dependable month-end close. Your numbers are ready when a lender, buyer, or auditor asks.
- “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.
Does MM.TAX prepare corporate tax returns?
Yes. We prepare and file C-corporation, S-corporation, and partnership returns, along with full-charge accounting, financial statements, and month-end close. Your books, returns, and IRS history stay with one team, so the numbers match everywhere. Flat fee, online anywhere in California.
Updated November 2026. Serving all of California online.
What we handle
Everything it takes to get this right.
Full-charge bookkeeping
Monthly reconciliations and categorization across every account.
Financial statements
Balance sheet, profit and loss, and cash flow reports.
General ledger and month-end close
Ledger management and a close on a fixed schedule.
Accounts payable and receivable
What you owe, what you're owed, and your cash position.
Management reporting
Reports on margin, trends, and financial position you can act on.
Clean-up and catch-up
Past periods rebuilt and reconciled, then a system to stay current.
What's included
What you get with accounting services.
What you'll get
- Monthly reconciliation of every bank and card account
- Balance sheet, profit and loss, and cash flow statements
- A month-end close on a fixed schedule
- Management reports you can act on
- Books ready for your CPA return, lender, or buyer
What to have ready
Don't have it all? Call anyway. We'll help you gather it.
- Access to your accounting software, or read-only bank feeds
- Bank, card, and loan statements
- Payroll reports
- A list of open invoices and bills
How pricing works
Every engagement is a flat fee, quoted in writing after your free 30-minute consult. No hourly billing, no surprise invoices. You'll know the full cost before any work begins.
Get my flat-fee quote
Who we help
Built for situations like yours.
Growing businesses
Owners who have outgrown do-it-yourself books.
Multi-entity owners
Consolidated, reconciled books across entities and locations.
Owners preparing for a loan, audit, or sale
Statements a lender or buyer will take seriously.
The process
How it works.
- 01
Discovery and setup
We review your books and workflow and plan any catch-up.
- 02
Clean up and reconcile
Every account reconciled and misclassifications fixed.
- 03
Ongoing accounting
Monthly categorization, reconciliation, and close on schedule.
- 04
Reporting and review
Statements and reports, reviewed with you.
- businesses with clean, current books
- 500+
- businesses with clean, current books
- average rating across 834 Google and Yelp reviews
- 4.9
- average rating across 834 Google and Yelp reviews
- years serving California owners and families
- 25+
- years serving California owners and families
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
From clients who've been there.
Free initial review. 30 minutes with a senior advisor to see where your books stand and what it takes to get them clean.
Common questions
Straight answers.
What is the difference between bookkeeping and accounting?
Bookkeeping records and reconciles transactions. Accounting turns those records into financial statements, a proper close, and reports you can make decisions from. This service includes both.
Do you work with QuickBooks, Xero, or other software?
Yes. We work in the major accounting platforms and can recommend one if you're starting fresh.
Can you clean up books that are months or years behind?
Yes. We rebuild past periods from bank and card records, fix misclassifications, and bring everything current.
How often will my books be updated?
Monthly, on a fixed close schedule, with statements delivered after each close.
How do you charge?
A flat monthly fee based on volume and complexity, quoted in writing. Catch-up work is quoted separately up front.
Service area
Serving clients online across California
Same team and same standards, wherever you are. No office visit needed.
Get started
Behind on your books? Let's get you current.
Free initial review. 30 minutes with a senior advisor to see where your books stand and what it takes to get them clean.