How do you get a tax exempt number?

For federal income tax purposes. Go to the IRS gov website and use the search box for User Fee Program for Tax Exempt and Government Entities Division

Go to the Related Link below enclosed website address

Revenue Procedure 2010-8, 2010-1 I.R.B. 234 (updated annually) provides guidance for complying with the user fee program of the Internal Revenue Service as it pertains to requests for letter rulings, determination letters, etc. on matters under the jurisdiction of the Commissioner, Tax Exempt and Government Entities Division; and requests for administrative scrutiny determinations under Revenue Procedure 93-41, 1993-2 C.B. 536.

In general, user fees apply to all requests for letter rulings, opinion letters, determination letters and advisory letters submitted by or on behalf of taxpayers or other entities. The fee may be refunded only in limited circumstances.

Requests to which a user fee applies must be accompanied by the appropriate fee as set forth in section 6 of Revenue Procedure 2010-8.

Exemption application (Form 1023, 1024, or 1028)

Organizations with annual gross receipts < $10,000 during preceding 4 years