In case the Primary Authorized Signatory has died or is not traceable, you need to approach relevant jurisdictional Tax Officer to set a new Authorized Signatory in the GST Portal.
You can check your jurisdiction in the Registration Certificate. Alternatively, you can check the My Profile section to check your Jurisdiction.
Yes, a Jurisdictional Officer can add a taxpayer as an Authorized signatory.
Yes, a Jurisdictional Officer can add two Authorized Signatories for a single GSTIN but primary Authorized Signatory can only be one.
Yes, a Jurisdictional Officer can mark an existing promoter/ partner as a Primary Authorized Signatory after proper authentication.