<h1>Biometric-based Aadhaar Authentication required for GST registration applicants in designated states; appointment and document verification via GSK.</h1> Amendment to the CGST Rules permits identification of GST registration applicants through data analysis and Biometric-based Aadhaar Authentication with photographing and original document verification. After submitting Form GST REG-01 an applicant will receive either an OTP-based Aadhaar authentication link or a link to book an appointment at a GST Suvidha Kendra for biometric authentication and document verification; ARNs are generated after completion of these verifications.