Billy has been our tax consultant for a number of years. We have been extremely satisfied with his knowledge and expertise in preparing our tax returns. After our move to Florida, this past November, we were confident in his abilities to file our 2025 tax returns with a Zoom meeting. Whenever we call him with questions, he responds quickly with reassuring answers and direction. We are at ease knowing that Billy is trustworthy and will continue to take care of our tax needs in the future. read more

When it comes to Taxes, they do an excellent job and they know what they're doing. And their reasonably priced.

We've used the Sierra-Larregui Tax Group for around 10 years to review or to calculate our federal and state taxes. We've been very satisfied with Billy's work that ensured our tax filings were correct. We started having Billy check and verify that our Turbo Tax inputs were correct in a year that we sold a house and bought a house. There were multiple ways for us to mess up the tax filing. Billy found a couple of entries that needed to be moved into a different area and filed our taxes for us. It was worth every penny. Normally, we do the bulk of the data entry in Turbo Tax Business and Home and provide him with the Turbo Tax software application native file to import into his tax software to analyze, check, and assess as an enrolled agent. A few years ago, we had a complicated series of real estate transactions that Turbo Tax would not let us enter the way we thought it should be entered. Based on our input, we owed more than we earned plus the sale of the property. It was obvious that something was wrong with our input, but we could not find where the error was in the data. We sent Billy the Turbo Tax file with everything except the real estate inputs - - which he validated was correctly input. Then he took the real estate information we provided and worked his magic. He filed our taxes with no errors. Again, worth every penny paid for the tax service. With significant changes being made frequently to what has to be provided in the family taxes, we are very pleased to use his tax services. Even if only to validate our input into Turbo Tax is correct. The peace of mind is worth every penny. Or should I say nickel since the penny is no longer made. read more

1/24/26 today i did my 1 hr Drive to do my Taxes at SIERRA-LARREGUI TAX in the CITY of BREA, MONICA has been doing my taxes for years and never had a problem, shes so nice and Billy, and baby..So come on down and do your TAXES.....5 ***** See u Next Year read more

Love this place. Been coming with Monica for years and went with Billy for the first time. Awesome experience every time and super affordable prices. I highly recommend read more

Always quick and affordable. Been going to this group for a couple of years and never had any complaints. Always willing to work with you about payment as well read more

Filing taxes always seem so confusing. But since I been doing my taxes with Billy the process is always smooth and easy. He answers all my questions in a great time manner and always so positive. Thank you Billy and Monica for your great service and always making your self available. I will continue to recommend you guys to family and friends because you guys are awesome. read more

I found them on the Anaheim Hills FB Buzz page. I contacted them through FB and Billy responded. My appointment was made within a few hours. Billy was professional and informative. Highly recommend. I will be back next year. Thank you! read more

Billy has been doing my taxes for many years, he is honest and always patient with all my questions and goes beyond to help me. I recommend Sierra-Larregui Tax Group to anyone that needs great honest service. Thank You SL Tax. read more

I don't know anyone that goes to a tax consultant office with a smile. With that said Monica was able to turn my frown to a smile. Kept it straightforward and kept assuring me giving me peace of mind. I'll be returning next year. read more

Billy has been doing my taxes for several years now. I do everything securely online. His fee is very reasonable, and I will continue to have him prepare my taxes. read more

I have been a customer of Monica and Billy for many years. They are always so helpful. I always recommend them to all my family and friends. If you need a reliable and honest tax preparer, don't hesitate to call Sierra-Larregui Tax. Thank You read more

For numerous years now, I have continued to do my taxes with the friendly people at Sierra-Larregui tax group. Not only did they take away all the stress that comes with filing my taxes, but they went above and beyond to answer all of my questions. 10 out of 10 will continue to do my taxes with them. Thanks for everything! read more

Thank you for answering my questions and filling my taxes in a timely manner. That's why I keep coming back. You guys are great!