IRS Small Business Resources
Federal tax information and EIN registration
The Internal Revenue Service provides comprehensive resources for small business owners to understand federal tax obligations, obtain an Employer Identification Number, access tax forms, and stay compliant with federal tax laws. These free resources help you navigate the complexities of business taxation.
Essential IRS Resources
Employer Identification Number (EIN)
Free federal tax ID number for your business
- Required for hiring employees or opening business bank accounts
- Apply online and receive EIN immediately
- Free application through IRS website
- Can also apply by mail, fax, or phone
Business Tax Forms
Essential federal tax forms for small businesses
- Form 1040 Schedule C for sole proprietors
- Form 1065 for partnerships
- Form 1120 for corporations
- Form 941 for quarterly employment taxes
Small Business Tax Workshops
Free educational programs and webinars
- Understanding business taxes workshop
- Record keeping and accounting basics
- Employment tax obligations
- Virtual and in-person sessions available
Tax Credits & Deductions
Reduce your tax liability with available credits
- Small Business Health Care Tax Credit
- Work Opportunity Tax Credit
- Research and Development Credit
- Business expense deductions
How to Apply for an EIN
An Employer Identification Number (EIN) is a unique nine-digit number assigned by the IRS to identify your business for tax purposes. It's free and easy to obtain.
Application Methods
Online (Recommended)
Instant EIN - available Monday-Friday, 7am-10pm ET
By Phone
Call 1-800-829-4933 (7am-7pm local time)
By Mail or Fax
Submit Form SS-4 (4-5 weeks processing)
Required Information
- Legal business name and structure
- Responsible party's SSN or ITIN
- Business address and mailing address
- Reason for applying (new business, hiring, etc.)
- Principal business activity
Tax Forms by Business Structure
| Business Structure | Primary Tax Form | Tax Treatment |
|---|---|---|
| Sole Proprietorship | Schedule C (Form 1040) | Report business income on personal tax return |
| Partnership | Form 1065 | Information return; partners report on Schedule K-1 |
| LLC | Varies | Taxed as sole proprietor, partnership, or corporation |
| S Corporation | Form 1120-S | Pass-through taxation; shareholders report on K-1 |
| C Corporation | Form 1120 | Corporate tax return; separate from owners |
Small Business Tax Calendar
Form W-2 and 1099 due to recipients
S-Corp and Partnership tax returns due
Individual and C-Corp tax returns due, Q1 estimated tax payment
Q2 estimated tax payment due
Q3 estimated tax payment due
Extended tax return deadline
Q4 estimated tax payment due
Form 941 employment tax returns (April 30, July 31, Oct 31, Jan 31)
Important: When a deadline falls on a Saturday, Sunday, or legal holiday, the due date is the next business day. Always verify current year deadlines on IRS.gov.
IRS Online Tools & Services
IRS Contact Information
Business Tax Assistance
Business & Specialty Tax Line
1-800-829-4933
Monday - Friday, 7:00 AM - 7:00 PM local time
General Tax Questions
1-800-829-1040
Official Website
Access forms, publications, tax law information, and online tools at the official IRS website.
IRS Small Business ResourcesQuestions About Federal Tax Requirements?
We can help you understand your federal tax obligations and connect you with resources to keep your business compliant with IRS requirements.
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