Welcome to Our Office

Rancho Tax & Accounting 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…

Bhaumik (Beau) Amin, EA

Bhaumik is a very successful Enrolled Agent who has agreed to merge his office, Tri-Check Tax & Accounting with Rancho Tax & Accounting Services. He has over 14 years of extensive experience along with a Bachelor of Science degree in Accounting.


Diane M. Martin, EA

Diane has been preparing tax returns since 1984, earning her Enrolled Agent designation in 1990. She prides herself in keeping up to date by attending as many conferences and seminars as she can.  She connects with other Enrolled Agents through the local chapter of California Society of Enrolled Agents.  She is active in the chapter and currently the newsletter editor.  And she also has a Bachelor of Science degree in Business Administration with a focus on Accounting

Mansi Joshi, CTEC

Mansi is an all-rounder. She worked for Beau at his old firm as an e-filer before getting hired as a full-time staff accountant with us. She has great bookkeeping knowledge coupled with outstanding customer service skills. She is unmatched when it comes to detailed research tasks and her work efficiency. She currently holds a CTEC license. And she completed her Bachelor of Science in Accounting at Cal Poly Pomona.

Komal Amin, Office Manager

Komal joined Rancho Tax Services in September 2022, and yes, she is the significant other of Mr. Bhaumik Amin. She decided to join our team to help us with the managerial and administrative tasks.


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.