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Electronic Filing

Providing Remote Services


Refund Direct Deposit


Located near UC Riverside in Canyon Crest Towne Centre


Walk-ins Welcome

January - April 

By Appointment only

Our Story

MSG has been servicing the community for more than 20 years.  It is a family owned and operated business offering bookkeeping and tax services.  Mirta Guinazu and Zulema Isola (Sue) are committed to their clients' needs and can offer knowledge which can only be gained by years of experience.  MSG is open year round and both Mirta and Zulema are available throughout the year to help answer any questions or concerns you may have.  


The business is solely run between Mirta and Zulema, therefore you can feel comfortable that you will always have the same tax preparer year after year.  They have clients that have been coming to them since they opened their doors referring their family and friends.  


MSG has continued to grow throughout the years because they offer a personal touch to tax services.  Open year round to help with any tax questions or concerns.  Offering peace of mind that you can be connected with your personal bookkeeper and tax preparer at any time during the year. 


"Our clients are like family and always treated with the greatest respect and personal attention"  - Zulema Isola.  


"We look forward to seeing everyone each year, it is like a family reunion" - Mirta Guinazu.


Members of the NATIONAL ASSOCIATION OF TAX PRACTITIONERS and voted one of the best tax preparation offices in the area. 

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