Understanding your CP6042 notice

Why you received this notice

We need more information about your business, estate, or trust entity. This is needed to verify information reported on your Form SS-4, Application for Employer Identification Number (EIN).

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What you need to do

If you were or are affiliated with the entity:

• Answer all the questions on the enclosed form in your notice and provide the information requested within 30 days from the date of the notice.
• If the notice is for an estate, send a copy of the deceased individual’s death certificate with your reply.
• If the notice is for a trust, send a copy of the Certificate of Trust document or the title and completed signature pages from the trust documents with your reply.

If you’re not affiliated with the entity, or you’re not the responsible party:

• Select the correct statement on the enclosed form, indicating no affiliation and provide your name.
• Return the enclosed form to us within 30 days from the date of the notice.

If the responsible party we have on file for the entity has changed, submit Form 8822-B, Change of Address or Responsible Party-Business PDF.

How to reply

You can reply to your notice with one of these options:

Upload

Use the IRS document upload tool by using the Document Upload Tool. This is the fastest way to send us your reply, digitally and securely.

You can upload photos or scans as JPG, PNG or PDF files.

Enter access code 246e2-765t5

Fax

Fax your response to 844-201-5531

What you should know

Failure to timely respond or update the entity’s information will delay processing of returns filed, issuance of refunds or applying overpayments to next year’s estimated tax, if applicable.

For faster processing, fax your information to the fax number in the notice using either a fax machine or an online fax service. Protect yourself when sending digital data by understanding the fax service’s privacy and security policies. Do not mail us your response if you have faxed it.

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Frequently asked questions

What will happen after I provide my response? (added Feb. 25, 2026)

If more information is needed, we will contact you by mail otherwise no other action is required.

What should I do if there's been a change of address or responsible party for the business, trust or estate? (added Feb. 25, 2026)

Submit Form 8822-B, Change of Address or Responsible Party – Business PDF.

What should I do if I think I could be a victim of identity theft? (added Feb. 25, 2026)

You can read Publication 5027, Identity Theft Information for Taxpayers PDF.

What should I do to protect my business and prevent data loss? (added Feb. 25, 2026)

Review Identity theft information for businesses.