Calculators

"Token not found" is the most common DSC complaint. Work through these checks in order; most problems are solved by step 3. Last reviewed: 27 October 2026 1. Identify the token and install its driver Each token brand needs its own driver. The brand is printed on the token. Get the driver from the token maker, your Certifying Authority, or your provider. Avoid random download sites. 2. Use a rear USB port Front ports and hubs can give unstable power. Plug the token directly into the computer. 3. Restart, then open the token software If the token's own software shows your certificate after a restart, the token works. Any remaining issue is with the portal's signing utility. 4. Start the portal's signing utility Income Tax e-filing uses emBridge . The GST portal uses emSigner . eProcurement portals publish their own DSC setup steps in their help sections. 5. Check validity and PAN An expired certificate won't appear. Portals also check that the PAN ins...

"Token not found" is the most common DSC complaint. Work through these checks in order; most problems are solved by step 3. Last reviewed: 27 October 2026 1. Identify the token and install its driver Each token brand needs its own driver. The brand is printed on the token. Get the driver from the token maker, your Certifying Authority, or your provider. Avoid random download sites. 2. Use a rear USB port Front ports and hubs can give unstable power. Plug the token directly into the computer. 3. Restart, then open the token software If the token's own software shows your certificate after a restart, the token works. Any remaining issue is with the portal's signing utility. 4. Start the portal's signing utility Income Tax e-filing uses emBridge . The GST portal uses emSigner . eProcurement portals publish their own DSC setup steps in their help sections. 5. Check validity and PAN An expired certificate won't appear. Portals also check that the PAN ins...

Many people pay for a combo DSC they don't need, while bidders sometimes buy signing-only and get stuck. Here's how to decide. Last reviewed: 27 October 2026 What each certificate does Signing Encryption Purpose Proves who signed, and that the document wasn't changed Locks a document so only the intended receiver can open it Typical use ITR, GST, MCA, EPFO, signing PDFs eTender bid encryption and some secure exchanges Quick rule Filing returns and forms only: signing is usually enough. Bidding on portals that encrypt bids: get signing & encryption . Unsure: check the portal's help page or the tender document before buying. Compare options on our Buy DSC page. References Controller of Certifying Authorities eProcurement Punjab