Handling All of Your Accounting Needs

Welcome to MG Business & Tax Service


All About Me

Martha Mendoza

I’ve been practicing personalized tax preparation and bookkeeping services in the South Bay San Diego area since 2001. I started off working from home as a single mother with five children, to eventually being blessed to have my own office. I've been so humbled by my experience, that I want to help others in similar circumstances. I am a trusted financial advisor to several small businesses, and a proud member of the National City Chamber of Commerce. During tax season, I will meet with client's individually to answer any questions they may have. What I think sets me apart, is that I like to treat my clients as family. Not only do I want to see you grow financially, but personally as well.


Small Business Bookkeeping

Whether you need financial advisement for your small business to something as simple as weekly payroll, we can tailor our services to your needs. We want to see you grow and succeed, and will help you with any concerns you may have. Some of our services include organizing your accounts and sending you monthly expense reports. For a more in depth look into your expenditures, we can further categorize transactions to specific projects or keep track of your inventory. We have helped local businesses in the South Bay, as well as companies throughout Southern California.

Individual and Business Tax Preparation

Whether you are planning to file individually or for your business, we can assist you with your tax preparation. Often, accounting issues result from lack of information. Our thorough process ensures that you are getting the best possible outcome on your tax returns. We see you as an individual and not a number, and will provide you honest, top quality service.

Quickbooks Training

QuickBooks is a great way to keep track of your income and business overhead. However, with so many features, it may seem complicated at first. We can help! As QuickBooks Certified ProAdvisors, we can train you on how to maximize your use of the program. For self-employed individuals, sometimes you just need a step in the right direction. Not only will this help with preparing for taxes at the end of the year, but correctly organize your finances to be more profitable.


Contact Me

Contact us to schedule an appointment. Please let us know if you are inquiring on bookkeeping services or tax preparation. We look forward to hearing from you!


Monday: 10-5:30

Tuesday: 11-7:30

Wednesday: 10-5:30

Thursday: 11-7:30

Friday: 10-5:30

Saturday: Appointment Only

Sunday: Closed

Appointments on Friday or Saturday are available upon request.

Se Habla Español

124 E 30th St. Ste D
National City, San Diego County 91950


124 E 30th St. Ste D
National City, San Diego County 91950

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