The CRN Full Form in Income Tax is Challan Reference Number. CRN can be described as a distinct, generally six-digit identification number that is associated with a challan payment slip that is used by taxpayers to deposit their tax payments in India. Discover what a CRN number is and why it's crucial for businesses. Learn about this unique identifier and how it impacts your company's operations. CRN full form in Income Tax The CRN full form is Challan Reference Number. Why does taxpayer need to create a Challan (CRN)? Resolution: In e-Pay Tax service at e-Filing portal, it is mandatory to generate the Challan for the payment of direct taxes. Every such generated Challan will have a unique Challan Reference Number (CRN) associated with it. Who can generate a Challan (CRN)? Resolution: Any taxpayer (including tax deductors & collectors) required to make direct tax payment and willing ... CRN stands for Challan Reference Number, a 14-digit unique identifier for online tax payments in India. Learn how to generate, use and track CRN for personal tax payments like self-assessment tax, TCS or TDS.