Tax, Payroll & Business Services for Families and Small Businesses
Trusted guidance. Clear answers. Remote services. Local care.
Appointments Only
Focused time. Better results.
Remote Services
Secure & convenient.
Business Support
Grow with confidence.
Bilingual Friendly
English / Español
Churches and ministries
Starting or legalizing a church?
Isaiah Leiva walks evangelical Christian churches and other ministries through California incorporation, and he helps other nonprofits too. In San Pablo, Concord, or remote. Approval is not guaranteed.
See church formation
Our Services
Comprehensive Solutions for You and Your Business
From personal returns to payroll, bookkeeping, formations and compliance — one team, year-round.
Church & Nonprofit Formation
Help incorporating a church or ministry in California, and other charitable nonprofits.
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Personal Tax Preparation
Federal and California returns prepared with care, in English or Spanish.
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Business Tax Preparation
Returns for sole proprietors, LLCs, S-Corps, C-Corps and partnerships.
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Bookkeeping Services
Monthly books, clean reports, and a tax season that starts organized.
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Payroll Services
Run payroll on time, with the right filings and clear pay stubs.
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Notary Public
Signature notarization by a California-commissioned Notary Public, in English or Spanish.
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Business Consulting
Help for owners making financial and tax decisions from the numbers they already have.
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Business Insurance
Help reviewing workers compensation, liability, commercial auto, property, and a business owner policy. Quotes come after a conversation. Nothing is guaranteed.
Learn moreWho We Help
Partners for Every Stage of Your Journey
We work with families, contractors, restaurants, churches, nonprofits, LLCs and small corporations across the East Bay.
Individuals & families
Personal tax preparation, ITIN assistance, year-round questions.
Small businesses
Tax returns, bookkeeping, payroll and formations for owner-operators.
Independent contractors
1099 organization, quarterly planning, expense tracking and filings.
Restaurants & retail
Sales & use tax, payroll for staff, and monthly bookkeeping.
Churches & nonprofits
Formation support, compliance filings and ongoing administrative help.
Corporations & LLCs
Entity setup, registered agent of service and annual filings.
How We Work
Simple. Secure. Stress-Free.
We take fewer clients so the work stays careful. From the first call to follow-up, you always know what comes next.
- 1
Schedule a consultation
Book in person or remotely. Tell us what you need and we suggest the right service path.
- 2
Bring or upload your documents
We share a clear checklist so nothing important gets missed.
- 3
Review with a specialist
We walk through your situation, answer questions, and confirm the plan together.
- 4
We prepare, file, or organize
From tax returns to payroll, formations or filings, we handle the work end to end.
- 5
Ongoing follow-up support
We stay available year-round for questions, notices, and the next step.
Meet our team
Meet the people who'll help you
Real people, personal attention, in English and Spanish. We take the time with each client: quality over quantity.
Isaiah LeivaI'm the founder and CEO. A specialty of mine is incorporating churches and ministries.CTEC Registered Tax PreparerIsaiah (Isaias Alberto Leiva) A319666Isaiah Leiva leads Stanza Tax Services, which he founded in 2020 with offices in San Pablo and Concord. He is a CTEC Registered Tax Preparer. One of his specialties is helping evangelical Christian churches and ministries incorporate in California and prepare the exemption filings that follow. He also helps other charitable nonprofits. Approval by an agency is not guaranteed. He oversees tax administration, financial review, and client relationships for families, small businesses, churches, and nonprofits. Before Stanza, he spent more than 25 years in information technology and education, and he holds a B.S. in IT Security.Book with Isaiah
Josephine LeivaI'm a multi-service specialist in Concord, a Notary Public, and a licensed insurance agent.CTEC Registered Tax PreparerA339664Licensed Insurance Agent, CA License #0I86522Property, Casualty, Life, Accident & HealthJosephine Leiva is the Multi-Service Specialist at Stanza Tax Services' Concord office, where she has helped clients since 2021. She is a commissioned California Notary Public and a licensed insurance agent (CA License #0I86522) for property, casualty, life, and accident and health. She supports clients with taxes, bookkeeping, payroll, and business insurance questions. Clients often mention her clear explanations and her fluent Spanish and English.Book with Josephine
Casandra LeivaI'm a multi-service specialist in San Pablo, and a Notary Public.CTEC Registered Tax PreparerA361076Casandra Leiva is a Multi-Service Specialist at Stanza Tax Services' San Pablo office and a CTEC Registered Tax Preparer. She is also a commissioned California Notary Public and provides Spanish–English translation support. She helps clients with appointments, document collection and follow-up, so every case keeps moving.Book with Casandra- Lucia LeivaI'm a multi-service specialist, and I help with the services we offer.CTEC Registered Tax PreparerA364394QuickBooks ProAdvisor CertifiedLucia Leiva is a Multi-Service Specialist at Stanza Tax Services. She focuses on bookkeeping, payroll, account reconciliations, compliance and financial reporting for the firm's business clients. She is a Certified QuickBooks ProAdvisor.Book with Lucia
Get started
Let's Find a Time That Works for You
Book online or send us a request — we'll confirm within one business day.
Client Stories
What Clients Say
Real reviews from real clients.
- Google
“I have been going here for two years now and I am very pleased with not only the efficiency of getting my taxes back but the above and beyond customer service Josephine does for her customers. This is a family owned business and I support it 100 percent. Her genuine care and compassion shines through her and her business. They are very helpful and if you need assistance in Spanish please call them! I know it is very difficult to deal with paperwork and to trust. With Stanza you will definitely be reassured you will be in good hands. Thank you!”
Claudia H.
San Pablo - Google
“There are very professional and genuinely care about helping their customers. I felt like it was the first time someone actually cared about my concerns and helping me.”
Chris C.
San Pablo - Google
“Excellent tax preparation service. Ms. Josephine took wonderful care of me; she is extremely kind and professional. What I appreciate most is that she was always willing to patiently address all my questions. Plus, she speaks both Spanish and English fluently, which makes the whole process so much easier. Highly recommended! I will definitely be back next year!”
Mariela C.
ConcordMay 2026 - Google
“The help I received was excellent; I am satisfied with the results. Thank you.”
Martha O.
Concord
Trusted by local businesses
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Contact us
We're Here to Help
Reach out with any question about your taxes, payroll, or business — we respond within one business day.
San Pablo Office
By appointment only · Remote services available across California
Map: U.S. Census Bureau, TIGER/Line 2023 (public domain).