How Do You Apply for a Tax Number?


Quick Answer

Apply for a tax number through the official website of the IRS or through the mail or fax, explains the Internal Revenue Service. International applicants can apply for a tax number over the phone.

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Full Answer

You can apply for a tax number online if your principal business is located in U.S. Territories or in the United States. You must have a valid Social Security or Taxpayer Identification Number, and you are limited to one tax number per day. When applying online, you must complete the application in one session because you are not able to save the information and return to finish the application at a later time. Your session expires after 15 minutes of inactivity, explains the IRS.

If you want to apply by fax, complete Form SS-4 and fax it to the appropriate number indicated on the form's instructions. A fax is returned to you within four business days with the assigned tax number. To apply by mail, use Form SS-4 and mail to the appropriate mailing address indicated on the instruction form. The number is returned to you within four weeks. As of 2015, to apply for a tax number by phone, call 267-941-1099 between 6 a.m. and 11 p.m. Eastern time Monday through Friday.

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