Need to change Primary Authorised Signatory Mobile Number and Email ID. Step by step guide to change primary authorised signatory details on gst.gov.in (GST Portal) :
Step-1 : Log on to www.gst.gov.in (gst portal) to go to Login Page or click here https://services.gst.gov.in/services/login
Step-2 : Click to Login button and enter your Credentials
Step-3 : In Dropdown of Services to – registration to – Amendment of Registration Non – Core Fields
Step-4 : Go to the Authorised Signatory Tab and Add New Authorised Signatory person
Step-5 : Save the person and go to last tab called verification and submit the application via DSC/E-Signature/EVC.
Step-6 : Re-Login to portal after some time.
step-7 : Again to go to the Authorised signatory tab and deselect the Primary Authorised signatory person and select the New Authorised person you’ve entered.
Step-7 : Change the Mobile number and Email Id of new Authorised signatory Details you want to change.
Step-7 : Submit the application again using DSC/E-Signature/EVC.
Note : DSC is required in case of Company/LLP