California business resource

IRS Resources for Small Businesses

Reach official federal resources for EINs, business taxes, recordkeeping, employment taxes, address changes, and business life-cycle questions.

When to use this guide

Start with the task, not the agency name.

Use the IRS business center when applying for an EIN, setting up federal tax records, hiring, changing a business address, or preparing to file or close a business.

Authoritative links

Go directly to the responsible organization.

Small Business and Self-Employed Tax Center Central IRS directory for starting, operating, changing, and closing a business. Employer Identification Number Official EIN eligibility, application, and update guidance. Starting a business Federal tax steps, structures, recordkeeping, and employer considerations. Business address changes IRS guidance for reporting business name and related account changes.

Important distinction

Know what this resource does not replace.

An EIN application is free when completed directly with the IRS. Protect EINs, tax transcripts, and account credentials as sensitive business records.

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