To set up a federal tax ID number (also called an Employer Identification Number, or EIN), contact your nearest Local IRS Field Office, or call the IRS Business and Specialty Tax Hotline at 800-829-4933.
You can also apply online for an EIN via the IRS web site. The online application asks the questions, you provide the answers and, just like that, you get your EIN immediately. You can then download, save, and print your EIN confirmation notice.
If you want to apply the old-fashioned way, the form you'll need to fill out is IRS From SS-4 (.pdf).
If your business does not have employees, the IRS recommends you label the top of the form SS-4 "For Identification Purposes Only."
Does your business even need a federal tax ID?
See: Do I Need a Federal Tax ID (EIN) Number?
Need Money for Your Business? If you're looking for money to start or expand you business, the U.S. Small Business Administration (SBA) offers several government-backed, low interest loans. In addition, all of the states offer business financing opportunities and incentives, including some direct grants.