Courses
Services
U.S. Business Formation Federal Tax Return Other-Business-Services
Resources
Blog Affiliate
About
About TAM Contact Us
TAM Portal

MEET THE TEAM
TAM MENTOR

Tam Mentor is powered by a highly skilled team specializing in U.S. company formation, international taxation, and regulatory compliance. With deep expertise in supporting foreign-owned and remotely managed businesses, we provide the strategic insight and hands-on support you need to operate successfully in the United States.

We don’t just teach—we partner with you to build a stronger, smarter business.

ABOUT TAM

HI, WE’RE TAM

TAM Accounting is a full-service U.S. accounting firm, and TAM Mentor was created to serve the unique needs of both U.S. residents and nonresidents.
Our mission is to provide a seamless platform where entrepreneurs, e-commerce sellers, Amazon sellers, and companies operating in the United States can access fast, professional, and reliable services.

Through TAM Mentor, you can easily obtain the most essential services — including U.S. company formation and federal/state tax filings — while also gaining access to high-quality educational resources that help you understand the U.S. system and accelerate your success.

Backed by a full-service accounting firm, TAM Mentor combines expert guidance, practical training, and efficient service delivery, giving you everything you need to grow with confidence in the U.S. market.

0+

years
experience

0+

happy
clients

0

have clients
different countries

0+

excellent and good testimonials

ABOUT THE TEAM

YESIM DERETAM

IRS Enrolled Agent • Certified Tax Coach • IRS Acceptance Agent • AICPA Member

 

 

Yesim Deretam is a U.S. tax expert specializing in international taxation, cross-border business structures, and compliance for global entrepreneurs. As the founder of TAM Accounting and TAM Mentor, she has helped thousands of clients across more than 50 states establish U.S. companies, maintain federal and state compliance, and optimize their tax strategies with precision and confidence.

Combining deep technical expertise with real-world business insight, she simplifies complex U.S. regulations for non-residents, e-commerce sellers, international investors, and expanding global brands. Her approach is strategic, educational, and results-driven—empowering clients to build stronger, more profitable operations in the United States.

TRAINING

  • IRS Enrolled Agent (Highest license awarded by the U.S. Treasury)

  • Certified Tax Coach (CTC) — Advanced tax reduction strategies

  • IRS Certified Acceptance Agent

  • Member of AICPA (American Institute of Certified Public Accountants)

  • Tax Planning Academy — Advanced Tax Strategy Programs

  • International Tax Education, AICPA

EDUCATION

  • Master of Business Administration (MBA) — Işık University

  • B.Sc. in Accounting — Southern New Hampshire University (SNHU)

  • B.Sc. in Mathematics — Gazi University

OUR GOALS

We help you build and grow your U.S. business with a seamless experience—from company formation and tax filing to essential compliance services and practical financial education.

Start & Operate With Confidence
We provide expert guidance for forming your company, filing your taxes, and staying compliant in the United States.

Accurate, IRS-Compliant Filing
Your federal and state tax returns are prepared by certified professionals to ensure accuracy and timely submission.

Complete Business Compliance
We manage the key requirements your business needs, including EIN, registered agent service, annual reports, and other essential filings.

Education to Strengthen Your Business
Through TAM Mentor, we offer clear and practical training to help you understand the U.S. system and make informed financial decisions.

Support for Long-Term Growth
Our goal is to simplify every step and give you the tools and guidance to build a strong, sustainable business in the U.S.

ASK YOUR QUESTION

FAQ

Â