Tax Consultant
1872 Points
Posted on 15 September 2026
DSC issues on the GST portal are almost always a browser or driver problem, not an issue with your certificate itself.
Three steps to try in order: (1) use Microsoft Edge in Internet Explorer compatibility mode (the GST portal has legacy dependencies), (2) check that the emsigner application is running in the system tray - if not, open it manually from the downloaded utility, and (3) reinstall the emsigner utility by downloading the latest version from the GST portal under Downloads.
Also worth checking: many DSC tokens issued in 2023-24 expire in August-September 2026. Open the emsigner app and verify your certificate expiry date before assuming it is a portal issue.
This [GSTR-9C reconciliation guide](https://taxgarden.in/blog/gstr-9c-reconciliation-statement-guide-fy-2025-26) has the complete filing flow for FY 2025-26 including the DSC signing step.