Essential IRS Documents for International Requirements

Time To Get Down To Business.

Vintage Happy New Year postcard of children toasting in an antique car
Celebrating Another Year of Supporting You and Your Document Legalization Needs.

A new year always brings fresh goals, new opportunities, and—for many people—important international plans. Whether you’re expanding a business overseas, relocating for work, investing abroad, or handling tax matters in another country, you may find yourself needing IRS documents that must be ordered, certified, and apostilled before they can be used internationally.

With tax season approaching, it’s not uncommon for there to be a surge in IRS‑related requests every January. If you’re preparing for international banking, foreign tax filings, residency applications, or business registration abroad, now is the perfect time to get ahead of the paperwork.

individuals who live and work abroad are still required to file certain IRS tax documents

Common IRS Documents That May Require an Apostille

IRS Form 6166 (Certification of U.S. Tax Residency)


This is the most common IRS document used internationally. It proves that an individual or business is a U.S. tax resident, often required for claiming treaty benefits or avoiding double taxation.

IRS Form 6166 Certification of U.S. Tax Residency letter

IRS EIN Confirmation Letter (CP 575 or 147C)

Foreign banks and government agencies often require proof of a company’s EIN. If the original CP 575 is lost, the IRS issues a 147C replacement letter.

IRS Tax Return Transcripts


Some countries require official transcripts—not copies of your tax return—to verify income or compliance.

IRS Wage and Income Transcripts

Useful for immigration, foreign employment, or financial verification abroad.

IRS Account Transcripts

These show your tax history, balances, and filings—often needed for international financial matters.

IRS Letters of No Filing

If you didn’t file taxes in certain years, some countries require official proof from the IRS.

I’m here to support you every step of the way, offering reliable notary and apostille services with clear communication from start to finish. This work is my passion, and I take pride in connecting with clients, prioritizing their needs, and providing timely updates throughout the entire document authentication process to ensure a smooth, stress-free experience.

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