You must have a taxpayer identification number so the IRS can process your returns. The two most common kinds of taxpayer identification numbers are the social security number (SSN) and the employer identification number (EIN).
A SSN is issued to individuals by the Social Security Administration (SSA) and is in the following format: 000-00-0000.
An EIN is issued to individuals (sole proprietors), partnerships, corporations, and other entities by the IRS and is in the following format: 00-0000000.
You must include your taxpayer identification number (SSN or EIN) on all returns and other documents you send to the IRS. You must also furnish your number to other persons who use your identification number on any returns or documents they send to the IRS. This includes returns or documents filed to report the following information.
1) Interest, dividends, and royalties paid to you.
2) Any amount paid to you as a dependent care provider.
3) Certain other amounts paid to you that total $600 or more for the year.
If you do not furnish your identification number as required, you may be subject to penalties.
See:
Employer Identification Number (EIN)
Payee's Identification Number
Information courtesy of the Internal Revenue Service.
Starting a Business and Keeping Records:
Introduction
What New Business Owners Need To Know
Forms of Business
Identification Numbers
Tax Year
Accounting Method
Business Taxes
Information Returns
Penalties
Business Expenses
Recordkeeping
How To Get More Information
