The IRS says our business already filed, but we did not. What records support a business identity-theft response?
An unauthorized return filed under a business EIN can require the IRS business identity-theft process, including Form 14039-B when appropriate.
By AE Tax Advisors Team · Updated October 28, 2026
An unauthorized return filed under a business EIN can require the IRS business identity-theft process, including Form 14039-B when appropriate. A duplicate-return message is evidence to investigate, not proof that the business itself filed. The response should establish authority, legitimate activity and the disputed filing without sending information to an unverified contact.
A specific business-owner situation
A corporation's first attempted filing is rejected because another return already appears under its EIN. The preparer must distinguish theft from an authorized preparer or prior transmission error.
Illustrative example, not a client result.
What to establish before filing
- Verify the notice through official IRS channels.
- Check all authorized filing activity.
- Follow the business identity-theft instructions for the specific situation.
Which fact changes the answer?
A legitimate prior filing requiring amendment differs from an unauthorized return. Establishing who filed determines the response path.
A mistake to avoid
Do not submit multiple conflicting returns without addressing the duplicate-filing cause.
Records that support the decision
- EIN and formation documents.
- Authorized return and rejection notice.
- Identity-theft affidavit and correspondence.
The decision to document
Maintain a controlled incident file and coordinate the legitimate return with the IRS theft-resolution process.
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Related questions
- Our company's responsible party changed. Is updating the bank enough for the IRS?
- We changed the business name but not its legal entity. Do we need a new EIN?
Sources and editorial context
General educational information prepared with AI assistance. No individual professional review is claimed. Apply the relevant tax-year rules to the actual records. Editorial policy · AI disclosure.