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International Tax Specialists

Our Carlsbad, California-based tax preparation services cater to international and US clients.

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US & Foreign

Our experienced team can provide expert advice and tailored solutions to help you make informed decisions.

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Tax Relief &
Tax Resolution

Our specialists strive to ensure your peace of mind, guiding you towards a smoother and more financially secure life.

Tax Preparation

International and US Tax
Businesses Tax
Individuals Tax


International Reporting
Business Tax Consulting
Immigrants tax guidance

Tax Resolution

Penalty Abatement
Audit Representation
Offer in Compromise

Other CPA Services

Start-ups consulting
Bookkeeping services
ITIN and EIN application

Our Certified Public Accountant Services

USiBTS offers comprehensive international tax preparation and consulting services to clients around the globe. Located in Carlsbad, California, we pride ourselves on upholding the highest ethical standards in our practice.

Our team stays current with the latest tax laws and regulations to ensure our clients receive accurate and up-to-date advice. We have helped countless clients navigate the complexities of international tax planning and compliance. Whether you are an individual or a corporation, we are committed to providing personalized service and expert guidance.

Our goal is to help you optimize your tax position while minimizing your risk exposure. Trust us to handle your international tax needs efficiently, professionally, and with integrity.

"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.

"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.

"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.

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.

"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 & Bookkeeping

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

Natalia Moskaleva and Denis Ovchinnikov

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, tax consulting, tax preparation, ITIN, and EIN. 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 services, you can rest assured that your tax and accounting needs will be handled with the utmost professionalism and care.

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Dennis Ovchinnikov

Company`s Co-founder Certified Public Accountant, Enrolled Agent

Certified with the IRS. Expert in international business taxation with over 20 years of experience.

Natalia Moskaleva

Company`s Co-founder Enrolled Agent

Certified with the IRS. With a background spanning more than two decades in tax, finance, and real estate investments.

Our Blog

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Foreign Real Estate

Understanding Taxes on Overseas Property Income

August 7, 2023

Read More

Your Foreign Earned Income Exclusion

July 26, 2023

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Requirements for Partnerships With Foreign Partners

March 5, 2023

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International Income Tax Treaties

March 13, 2023

Read More


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!

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!




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.

Our clients associated with many U.S. and International companies

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