About
About MM.TAX
Tax preparation and advisory services for Northern California businesses and high-net-worth individuals. Built on the belief that sophisticated clients deserve a trusted financial partner — not a commodity.
Our Story
Serving the Bay Area for over 25 years
MM.TAX began with a simple conviction: business owners and high-net-worth individuals in Northern California need more than once-a-year tax preparation. They need a partner who understands the full picture — tax, structure, planning, and clean books — and who is available when decisions are made, not just at filing season.
For over 25 years, we have served hundreds of business owners across the Bay Area and beyond, building relationships on trust, precision, and proactive counsel. We work with founders, real estate professionals, attorneys, medical practices, and family-owned enterprises — clients whose financial lives are too complex for a template.
Our approach is direct. We speak plainly. We return calls. We plan ahead. And we treat every engagement with the confidentiality and rigor a tax practice demands.
Legal Entity
Mauricio Midence Inc
- Legal Entity
- Mauricio Midence Inc (Wyoming Corporation)
- Operating Address
- 2552 Appian Way, Pinole, CA 94564
- Registered DBA
- MM Online Tax Services
MM Online Tax Services is a division of Mauricio Midence Inc. DBAs registered in Contra Costa County, California (filed August 26, 2026; expires August 25, 2031). All services provided from 2552 Appian Way, Pinole, CA 94564.
What We Do
Tax preparation and advisory services
MM.TAX is classified as a tax preparation and tax-related advisory practice. We serve business owners and high-net-worth individuals across Northern California with the full scope of services below.
Ready to work with a partner who gets the full picture?
Tell us about your business. We’ll map the path forward — whether you need resolution, planning, or clean books.