Business owners in the United States often encounter form rejections (like the W-9) due to confusion between the SSN and EIN. This is a common challenge in the country’s federal tax system, particularly for SaaS platforms managing payouts to creators or vendors. Similarly, cross-border traders face delays in withholding tax claims from unverified identifiers during client onboarding.
The US tax regulations are under the Internal Revenue Service (IRS). Errors in distinguishing social security numbers from employer identification numbers are frequent. Misusing an SSN in business filings allows for identity theft risks and compliance violations. This article answers the 10 essential questions about TIN in the US, offering clear insights to help you navigate the system. It is notably applicable for international entities, with solutions like TaxDo providing efficient tools for ongoing compliance amid 2026 digital IRS portal updates.
