Letter 4883C means the IRS received a return in your name but needs to verify your identity and confirm that you filed it. Processing is paused until you complete the phone verification described in the letter.
This guide also covers Letter 6330C, a pilot identifier that the IRS handles using Letter 4883C procedures. Follow the contact instructions on the letter you actually received.
Use the Number on the Letter
Call the Taxpayer Protection Program number printed on your Letter 4883C. Have the letter, the return identified in it, a prior-year return, and supporting wage or income documents available. The IRS will ask questions about your identity and the return.
Timeline
If you confirm that you filed the return, the IRS can resume processing. The IRS advises allowing up to nine weeks after successful verification, although some returns take longer. If you did not file the return, say so during the call so the IRS can begin the identity-theft process.
While You Wait
Do not use a phone number from a text message or search ad. Compare the letter with the official IRS Letter 4883C page, then use the contact instructions on the actual notice.
If you need help responding to Letter 4883C, call us at (813) 229-7100.