International Tax Preparation

We prepare tax returns for International and US clients, including businesses and individuals.

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Tax Consulting

We prepare and e-file tax returns for individuals and businesses. We prepare installment agreements for
federal and state tax agencies.

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U.S. Tax Preparation

Consult with us before making any major decision about your businesses or life changing events.

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Start-ups Tax Consulting

We will help you to choose the right state and right type of business entity to offer you the biggest tax

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Accounting & Bookkeeping

We offer accounting and bookkeeping services, customized financial statements and reporting for

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EIN & ITIN Services

We offer ITIN application with passport certification service. We help local and international businesses
apply for EIN.

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Why choose us

We are a driven enterprise that constantly seeks to provide nothing short of the best for our clients. Based in Carlsbad, California, we offer ethical tax solutions to our clients within and outside the U.S. across all corporate levels – from individuals and sole proprietors to well-renowned multinational groups. As international tax specialists, our services are not limited by distance or language. We offer solutions to clients around the globe. We are very passionate about what we do and constantly endeavor to go the extra mile.

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We always welcome our clients` feedback.




USiBTS handle all my personal and firm issues. After delivering me from a nightmare of complicated tax problems, everything so far has been easy. They are fast, direct, customer-oriented, and the easiest-going company I’ve ever partnered with. Kudos!




We were experiencing problems with our overall tax system and was on a thin line, but fortunately, we found USiBTS, which not only swooped in to save the day but resolved it quite quickly.



I don’t know how to thank USiBTS enough. My business would have been history if they hadn’t shown up for me. In only 24 hours, they analyzed my past tax history and put together a detailed plan, even if it was short-noticed. It was unlike anything I’ve ever seen.

International tax client


USiBTS is the best. Not only did they help me make sound decisions, but they also followed up with me to ensure I didn’t make any other mistakes! I highly recommend them for any tax needs and financial advice. They are too good!