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CERTIFYING ACCEPTANCE AGENT SERVICE Individual Taxpayer Identification Number
Do you need to apply for or renew an ITIN (Individual Taxpayer Identification Number)?
As a leader in processing W-7 Applications, Sirius Tax Group is here to help you, whether applying for yourself, a spouse or family member.
For more information, check out our page about the ITIN process and what separates us from the rest.
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Referral Partnerships
Partner with Sirius Tax group
Partner with Sirius Tax Group for trusted ITIN and tax support for your international community.
Are you part of an embassy, consulate, university, or cultural organization in the DC metro area? Sirius Tax Group, led by Sydney R. Smith, MBA CAA, known as “The ITIN Lady," is your trusted partner for helping newcomers and foreign nationals navigate U.S. tax and ITIN requirements with confidence, care, and cultural sensitivity.
Why Partner With Us?
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Over 25 years of ITIN, tax and international client experience combined
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Certifying Acceptance Agent (CAA) with rigorous IRS and DHS forensics training
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95%+ ITIN approval rate, including complex cases and denials
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Year-round, multilingual support -- virtual and in-person
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Deep understanding of Visa, cultural and residency challenges
Who We Help:
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International students
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Foreign professionals and families
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Diplomats, foreign dignitaries and families
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Business owners and entrepreneurs
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Anyone needing ITINs or specialized tax guidance
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To learn more about our Referral Partnerships for international clients,
click here.
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Here’s what our clients and colleagues have to say about us!
K.L., Albania
Thank you helping me get my ITIN, my University required it. Thank you for explaining what my F Visa allowed and doesn’t allow being a student here and thank you for helping me file all my returns.
T.B., Maryland
Sirius Tax Group LLC provides exceptional personalized tax preparation services. Their expertise and attention to detail ensure an efficient and accurate tax filing process. Sydney’s ability to comprehend intricate financial situations and offer expert guidance is truly commendable. They not only maximized my tax refund but also imparted valuable tax strategies for future financial planning.…
R.O., CEO, New York
The organization has what it takes to make your vision and wants and dreams a professional reality and I would highly recommend anyone with a vision and goal to utilize the CEO’s EXPERTISE IN BUSINESS, CULTURE, PROFESSIONALISM, AWESOME!!!
A.G., Ethiopia
Thank you so much for getting my wife’s ITIN. This is such good news! I will tell all my friends.
K.A., Maryland
I’m officially in business now! I especially appreciate the attention to detail you paid when it came to startup and compliance both at federal and state level.
T.M., Washington, DC
Thank you for taking care of my nonprofit startup in DC!
Y.M., Washington, DC
I sincerely appreciate you doing my business startup for me. I didn’t want to deal with DCRA and you handled everything for me. And thank you for helping me with the licensing required.
J.T., Tax Attorney, Maryland
That’s why they call you “The ITIN Lady!”
T.R., CEO, North Carolina
You are a terrific presenter. Please post your email. I want to correct you personally. Thanks for what you do.
M.M., President & CEO, Texas
Thank you!!!
S.F., Principal, North Carolina
Ms. Smith is an effective presenter. She is both passionate and knowledgeable about the subject.
A.Y., Partner, Chicago
The presenter was knowledgeable and informative.
J.C., CPA, New Jersey
Great, considering the fact that I do volunteer work at a not for profit immigration center.
M.S., Tax Professional, Texas
Thank you very much for an excellent presentation about the IRS’s Certified Acceptance Agent program. Your presentation was very informative and now I have a much better understanding of the program and how it can benefit my clients.
J.P., Philippines
As you know I have an H-1 Visa and I wasn’t sure about this whole process. Thank you for explaining the election to treat my non-resident spouse as a resident for tax purposes. We’ve received her ITIN and a big fat refund! You’re the best Ms. Smith!
J.K., Japan
My wife and I are most appreciative of you filing my ITIN application and also getting me money back from last year’s return. Apparently your colleague didn’t understand tax treaties or my J-1 Visa. We’ve gotten a refund back that I didn’t expect and my wife got her ITIN approval today.
S.H., Jamaica
My husband got his W-7 application approved on his B1-B2 Visa. Thank you for filing this for us and helping my husband navigate this process as well as our tax return, my 1099 and with our MFS status. Your knowledge is quite apparent.
N.R., France
Thank you so much for helping me getting the ITIN for my three children. As you know, I have an L-1 Visa and my children do not have Social Security numbers. Thank you for also clarifying the difference between an employee and an independent contractor here in the U.S . and the differences in taxation.
J.T., Trinidad
I am so grateful to you Ms. Smith for your help. You filed two years of Maryland returns and I got a Maryland ID, which I didn’t know I was eligible for. Since coming to you some years back, I have now gotten my Green Card and a Social Security number and am now in…
M.A., Saudi Arabia
Thank you for helping me apply for the ITIN. As you know, I am a student here and I made money as a student. I really did not understand the process, but you explained everything to me, answered any questions I had and walked me through the process, which I was really nervous about.
N.K., Nepal
I can’t express how happy I am that my husband received his ITIN today. You are extremely professional and knowledgeable. Thank you!!
M.O., Pakistan
My wife got her ITIN today. My brother, a CPA, told me you are tops and your service is really outstanding!