How to Link and Use Your DSC on the GST Portal (2026)

Step-by-step instructions to register your DSC on the GST common portal, complete filings, and resolve common driver/browser configuration errors.

How to Link and Use Your DSC on the GST Portal (2026)

GST Portal DSC Registration

Filing GST returns or registering a new entity requires secure authorization. While proprietorships can file returns using OTP (EVC), companies and LLPs are legally mandated to sign GST returns using a Class 3 Digital Signature Certificate. Linking your DSC on the GST common portal is a one-time configuration that enables secure, tamper-proof tax filing.

Configuring Your System for GST DSC

To use your DSC on the GST portal, you must configure the **emSigner** utility, which bridges your USB token with the web browser:

  1. Download the latest version of emSigner GST from the GST portal's help section.
  2. Run the installer as an Administrator and start the service.
  3. In your browser, ensure that local connection protocols are allowed.
  4. Plug in your USB token and navigate to the GST portal register page.

Frequently Asked Questions

Is DSC mandatory for GST filings?
DSC is mandatory for companies (Pvt Ltd, Public Ltd) and LLPs. Proprietors and partnerships can file using DSC or Aadhaar EVC.

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