"U.S. Tax Preparation Experts" image showcasing our certified professionals offering comprehensive solutions for individuals and businesses to alleviate tax burdens and ensure compliance.

U.S. Tax Preparation

We offer comprehensive tax services, including tax return preparation, e-file, and representation before the IRS.

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"International Tax Services in Carlsbad" image showcasing USiBTS's comprehensive guidance and compliance solutions for international tax preparation.

International Tax Preparation

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

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"Expert Tax Consulting Strategies" image showcasing USiBTS's years of experience, deep understanding, and personalized solutions for transforming businesses.

International & US Tax Consulting

We provide professional tax consulting services to help individuals and businesses navigate complex tax laws and optimize their financial benefits.

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Tax Relief & Tax Resolution Services

Tax relief and resolution services for businesses and individuals, including assistance with IRS audits, unfiled returns, penalty abatement, and more.

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"Start-up Consulting: Tax Analysis, Entity Types, and EIN/ITIN Applications" image showcasing comprehensive services for tax planning, entity selection, and obtaining EIN/ITIN for startups.

Start-ups Tax Consulting

Our expertise in tax planning allows us to assist you in selecting the most advantageous state and business entity type, maximizing your tax benefits.

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"Accounting and Bookkeeping Services" image showcasing the importance of professional financial management for businesses.

Accounting & Bookkeeping

We provide customized accounting and bookkeeping services designed to meet the unique needs of your business.

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Denis Ovchinnikov - Certified Public Accountant in Carlsbad and San Diego, CA

Why choose us

Looking for tax preparation in Carlsbad, California? Choosing our tax and accounting services is a wise decision for many reasons. Our team of CPAs and enrolled agents, certified by the IRS, possess the knowledge and expertise to handle all your tax and accounting needs.

We offer a one-stop for bookkeeping, tax planning, consulting, tax preparation, ITIN application online, and EIN application. Our ability to represent clients in all states adds an extra layer of convenience and peace of mind. We strive to provide exceptional customer service and personalized attention to every client.

With our reliable and efficient Certified Public Accountant services, you can rest assured that your tax and accounting needs will be handled with the utmost professionalism and care.

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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!