Employee ID Number

Recommended by IRS

Employer Identification Number

Information about Employer Identification Numbers (EIN), also known as a Federal Tax Identification Number. An EIN is used to identify a business entity.

Apply for an Employer Identification Number (EIN) online
Information about how to apply online for an Employer Identification Number.
Do you need a new EIN?
Generally, businesses need a new EIN when their ownership or structure has changed.

National Tax Security Awareness Week, Day 5: Security Summit partners remind businesses to tighten security; be aware of steps to help prevent, protect data loss

IR-2021-241, December 3, 2021 — The Internal Revenue Service, state tax agencies and the nation’s tax industry urged businesses to be alert to cyberattacks aimed at gaining access to business data and customer information and be aware of steps to help them on tax-related issues related to identity theft.
News
News Media, Businesses

Income Verification Express Service faxing for participants

Income Verification Express Service (IVES) participants who have received taxpayer consent can use the faxing option to receive transcripts in approximately 2-3 business days.
General Information
Individuals, Businesses

Miscellaneous qualified intermediary information

A qualified intermediary (QI) is any foreign intermediary (or foreign branch of a U.S. intermediary) that has entered into a qualified intermediary withholding agreement with the IRS.
General Information
Large Businesses

Forms for corporations

Get a list of IRS forms for corporations.
General Information
Small Businesses

Energy Efficient Home Improvement Credit qualified manufacturer requirements

To qualify for Energy Efficient Home Improvement Credits, manufacturers must enter a written agreement with the IRS and report information for each qualified energy property they manufacture.
General Information
Businesses

Reporting Agents File (RAF) tips and tricks

Information to assist reporting agents. Includes process, system, and other information to avoid common mistakes.
General Information
Small Businesses

E-file for Large Business and International (LB&I): Frequently asked questions — Tax year 2023

Tax Year 2023 frequently asked questions about e-file for Large Business and International (LB&I).
General Information
Corporations

Substitute Product Codes

Memorandum for EXSTARS information providers.
General Information
Small Businesses

What are FTDs and why are they important?

A description of FTDs and why they are important is provided.
General Information
Small Businesses

Questions and answers about information reporting by employers on Form 1094-C and Form 1095-C

Questions and Answers about employer information reporting on Form 1094-C and Form 1095-C
General Information
Businesses