What Is the EIN Field on Form 1120? Employer Identification Number Explained
Key Takeaways
- The EIN is a nine-digit number (XX-XXXXXXX) at the top right of Form 1120
- Your EIN is on your CP 575 or 147C letter
- EINs are permanent and do not expire
The EIN Field on Form 1120
The EIN (Employer Identification Number) field is at the top right of Form 1120 Page 1. This nine-digit number (XX-XXXXXXX) identifies your LLC with the IRS across all filings, payments, and correspondence.
Why the EIN Is Critical
Filing with the wrong EIN — or without one — will cause your return to be rejected or misprocessed. For foreign-owned single-member LLCs, the EIN is obtained by filing Form SS-4 by fax or mail.
Your EIN Is Permanent
Once assigned, your EIN does not expire or change. Use the same EIN for every filing. Find it on your CP 575 confirmation letter or request a 147C verification letter.
Frequently Asked Questions
Can I file without an EIN?
No. Apply using Form SS-4 before filing. Foreign owners without SSN/ITIN must apply by fax or mail.
IRS Form 1120 Instructions
Official IRS source on irs.gov
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