Welcome to Our Office

Rancho Tax Services will work with you on a personal level to determine the best solutions for your unique needs, then leverage our seasoned expertise to achieve the best possible results.

We are your trusted partner in success. Our firm is large enough to offer a full range of professional services at a fair price, but small enough to give you the individual attention that you deserve.

Rest assured that when a need arises, our firm is ready and capable to handle everything for you so you can focus on what matters most to you.

About Us…


Diane M. Martin, EA

I have been preparing tax returns since 1984, earning my Enrolled Agent designation in 1990. I pride myself in keeping up to date by attending as many conferences and seminars as I can.  I connect with other Enrolled Agents through the local chapter of California Society of Enrolled Agents.  I am active in the chapter and currently the newsletter editor.  This year I completed additional course work in Audit Representation.I also have a Bachelor of Science degree in Business Administration with a focus on Accounting.

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Christina Rivas, EA

This is Christina’s second year working with RTS. She has been preparing tax returns since 1992. She received her Enrolled Agent designation in 2012.  She has been helping several small business owners get up and running and is a pro-advisor with QuickBooks. She is also a member of several professional organizations including California Society of Enrolled Agents.


Jessica Rosser – Office Manager

She is the first person you will speak to when you call. She is responsible for scheduling appointments, and providing support for the tax preparers.  She is our payroll specialist, and has assisted with bookkeeping.  She provides excellent customer service and we are pleased to have her on her team.  Jessica is studying to become a tax professional, so don’t be surprised when she can provide answers to your tax questions.


Enrolled agents (EAs) are America’s tax experts.
An Enrolled Agent is a person who has earned the privilege of representing taxpayers before the Internal Revenue Service by passing a three-part comprehensive IRS test covering individual and business tax returns.

They are the only federally-licensed tax practitioners who specialize in taxation and also have unlimited rights to represent taxpayers before the IRS. Enrolled agents are required to complete many hours of continuing education each year to ensure they are up-to-date on the constantly changing tax code and must abide by a code of ethics. When you need a true tax professional, see an enrolled agent.