When responding to IRS Letter 4883C, identity verification may be completed either online or by phone, depending on the options provided in the letter. The IRS determines which methods are available based on the information needed to confirm the taxpayer’s identity.
Online Identity Verification
Some taxpayers are eligible to verify their identity online using IRS-provided verification tools. Online verification typically involves answering questions based on prior tax returns and personal records. This method can be completed without speaking to an IRS representative if all required information can be confirmed digitally.
Phone Identity Verification
Other taxpayers must complete identity verification by phone. In these cases, the IRS requires direct interaction with a representative who asks verification questions to confirm identity. Phone verification may be required when online verification is unavailable or cannot be completed successfully.
Why Verification Options Differ
The IRS does not offer the same verification methods to every taxpayer. Availability depends on the type of return filed, prior filing history, and the specific risk indicators that triggered IRS Letter 4883C. The letter itself explains which verification options apply to your situation.
What to Expect During Verification
Whether verification is completed online or by phone, the IRS asks questions designed to confirm personal and tax-related information already on file. Details about the information commonly requested are explained in what information the IRS asks for.
Choosing the Correct Method
Taxpayers should follow the verification instructions provided in IRS Letter 4883C and use only the methods listed in the notice. Attempting to verify identity through other IRS channels may delay processing.
Related Guidance
This page explains the differences between online and phone identity verification for IRS Letter 4883C. For step-by-step instructions on completing verification, see the main guide.
How to verify your identity for IRS Letter 4883C
To return to the main overview of the letter and its purpose, visit the guidance hub.
IRS Letter 4883C: what it means and how to respond
For the official description of the notice and its role within the tax system, refer to the document overview.
IRS Letter 4883C. Potential Identity Theft During Original Processing