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GST Portal Forgot Username & Email/Mobile Update Guide 2026

Security: Use only gst.gov.in and the official GST help/tutorial pages for login recovery. Do not share OTPs, passwords or DSC credentials with anyone claiming to recover your GST account.

GST Portal forgot username / login recovery

If you cannot remember your GST Portal username or no longer have access to the registered email/mobile number, first determine whether the problem is a forgotten credential or outdated registration contact details. The recovery route depends on the account type and what access you still have.

ProblemRecommended action
Forgot usernameUse the GST Portal's Forgot Username/login recovery option and complete the identity verification requested on the portal.
Forgot passwordUse the official Forgot Password option; complete OTP/security verification.
Logged in but email/mobile is oldUse Services → Registration → Amendment of Registration Non-Core Fields where applicable.
No access to registered contactsFollow the GST Portal's authorised-signatory/contact amendment or jurisdictional help route applicable to your case.

Updating email or mobile after login

GST's official user guide states that registered contact details can be updated through Services → Registration → Amendment of Registration Non-Core Fields. For an authorised signatory/promoter, edit the relevant record, enter the new email/mobile details, complete OTP verification and submit the amendment.

Before changing authorised signatory details

  • Confirm which person is the Primary Authorised Signatory.
  • Ensure the new email address and mobile number are controlled by the business/authorised person.
  • Keep board resolution/authorisation records where relevant.
  • Do not use a consultant's personal email/mobile as the permanent business recovery contact unless formally intended and controlled.

Useful recovery checks

  1. Open gst.gov.in directly.
  2. Use the login recovery option rather than links received on messaging apps.
  3. Keep GSTIN, PAN/legal-name information and authorised-signatory details available.
  4. Complete OTP verification only on the official portal.
  5. After recovery, update stale contact information and store credentials securely.
Can I change the registered email/mobile online?

GST's official user guide provides an amendment route through Registration → Amendment of Registration Non-Core Fields for eligible contact-detail changes.

Should I share OTP with my accountant or consultant?

OTP handling should be tightly controlled. Do not share OTPs with unknown callers or anyone claiming to be GST support.

Where can I verify the process?

Use the GST Portal and its official tutorial/user-guide website.

Official references