Digital Signature (DSC) Guide

In the digital era of compliance, the pen-and-paper signature is dead. From filing Income Tax Returns to incorporating a company on MCA, the Digital Signature Certificate (DSC) is your identity.

What is a Class 3 DSC?

Earlier, there were Class 2 and Class 3 DSCs. Now, Class 2 has been discontinued. Only Class 3 DSCs are issued, which offer the highest level of security. They are used for:

• GST Registration & Filing
• Income Tax Filing
• MCA (ROC) Compliance
• E-Tendering

How to Register DSC on Income Tax Portal

1. Log in to the e-Filing portal.
2. Go to My Profile > Register DSC.
3. Enter the email linked to the DSC.
4. Select Provider (e.g., ePass 2003) and Certificate.
5. Enter the PIN and click Sign.

Common Errors & Fixes

• “Token not found”: Reinstall the USB driver. Try a different USB port.
• “Certificate mismatch”: Ensure the name in PAN matches exactly with the name in DSC. Even a spelling mistake can cause rejection.