You can report your self-employed business income on Schedule C using your Social Security number without having an EIN or Federal ID number. You may be seeing a box to fill in an EIN as you go through TurboTax. If you do not have one and do not have a reason to have one, you can skip this entry.
However, if you had employees for your business, you do need an EIN. This number is assigned to you through the IRS. See the following link for more information: