- 1). Submit an online application. The IRS allows applicants to complete an Internet application. After completing the application, you will receive a tax identification number immediately from the IRS. Business owners can start using the number right away. A confirmation letter with the number will also be mailed. Keep this letter for your records.
- 2). Contact the IRS by phone. Another option for securing a tax identification number is by calling the IRS at 800-829-4933. The IRS employee will complete a phone application. She will ask about the structure of the business (sole proprietorship, partnership, corporation, limited liability company). After completing the phone application, she will provide you with a tax identification number over the phone.
- 3). Send an application through fax. Download the application form, which is called the SS-4, from the IRS website. Complete the application and fax to the number included on application materials. With this option, it takes up to four business days to receive a tax identification number.
- 4). Send an application through mail. Print the SS-4 form and complete. Mail to the address included on the application. Applying through mail takes the longest. According to the IRS, a tax identification number should be received in up to four weeks.