The IRS says I already filed. What do I do next?

Are you sure you didn't file? And you didn't let someone else file for you? If the answer is no, it's possible a bad actor filed a tax return using your Social Security Number (SSN). You will need to paper file a tax return and attach Form 14039, Identity Theft Affidavit.

The IRS will start an investigation. They will contact you through the mail with follow-up steps to confirm your identity. They will also reach to the bad actor. This investigation can take 8-12 months.