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Hi Linda and welcome to our site!The IRS Form CP575 is the IRS generated letter you receive from the IRS granting your Employer Identification Number.Here is an example of that letterhttp://www.nachi.org/documents/cominspectein.pdfFor copy you need contact IRS via the phone. Call _1_800_829_4933_ from 7:00 a.m. to 10:00 p.m.Actually - the IRS will not re-issue or provide a copy of the CP-575 Letter.
If you lost your original letter and need to confirm your EIN - the IRS will send you the letter 147C that may be used when you are asked for the CP575 Letter.
The letter 147C is accepted for Medicare billing purposes.