International tax specialists · 100% virtual · since 2016

Pay less tax legally. Grow your U.S. business on numbers you can trust

The savings come from knowing the rules. The growth comes from knowing your numbers. We deliver both for your U.S. company and personal taxes, in your language, whether you live here or abroad.

  • International tax specialists for foreign-owned businesses
  • 100% accurate returns, guaranteed
  • IRS Certifying Acceptance Agent (ITIN)
  • Bilingual team — English & Português
  • Virtual firm serving all U.S. states except NY & NJ
  • CTEC registered
Cristina Hass, founder of Office Tax Services

“We help people understand U.S. rules in their own language — that is where real savings start.”

Cristina Hass · Tax Strategist, Accountant and CEO

10+ years

Serving small businesses since 2016

$1.3M+

Estimated tax savings identified for clients since 2016

500+

5-star reviews across review platforms

100% virtual

Serving every U.S. state except NY & NJ

Bilingual

Every meeting and support in English or Portuguese

How the savings happen

Accurate reports first, savings and growth next

Tax savings are not found in April. They come from clean monthly numbers and a plan made while the year is still open.

  1. 01

    Accurate numbers, every month

    Your books are closed and reconciled monthly, so revenue, margins and cash are real figures instead of estimates.

  2. 02

    Tax planned before it is due

    We look at the year while there is still time to change it — structure, owner pay, timing, deductions and estimated payments.

  3. 03

    Decisions that grow the business

    Pricing, hiring, equipment and expansion decided with your own reports on the table, in English or Portuguese.

Monthly plans

Monthly accounting, with room to grow

Four tiers at one flat monthly price. Essential covers bookkeeping and monthly reports; the higher tiers add filings, notice support, payroll and tax strategy.

See plans and pricing

Clients

Reviewed by the people we serve

Cristina has been so helpful every step of the way with business suggestions, saving us money, and making everything super easy for taxes.
Jessica WaalaThe Healing Couple
Professional company, great portal system, and reliable professionals. Highly recommend for personal and business taxes.
Michel ChahiniClient
Excellent customer service. Cristina and Marcella were really helpful throughout the process and made it really easy.
Cecilia ZaccarelliJournalist

FAQ

Straight answers

Still unsure? A consultation is the fastest way to a real answer.

What makes your accounting service different?
A bilingual team and one accountant who knows your file. You can hire each service separately, or choose a monthly plan where the higher tiers fold the tax and compliance work into one flat price.
Can I switch plans as my business grows?
Yes. Move up at any time; the new price applies from the next monthly cycle.
Do you work with clients outside California?
Yes. We are a 100% virtual firm based in Murrieta, California, serving clients in every U.S. state except New York and New Jersey, and abroad, entirely online.
What if I have questions outside business hours?
Send a message in the secure portal or on WhatsApp and you get an answer the next business day at the latest.

Ready to work together?

Bring your questions and your last tax return. We will tell you exactly where you stand.