<h1>Biometric Aadhaar Authentication: appointment-based GSK verification now required for GST registration in select jurisdictions.</h1> An amendment permits identification on the GST portal by selection for Biometric Aadhaar Authentication with a photograph and original document verification; GSTN has rolled out this functionality in Maharashtra and Lakshadweep. After Form GST REG-01 applicants receive an intimation e-mail with either an Aadhaar OTP Authentication link or a booking link for a GSK appointment. If appointment-based verification is required, applicants must book a slot, attend the GSK with appointment confirmation, jurisdiction details, original Aadhaar and PAN, and original uploaded documents. ARNs are issued after completion of biometric authentication and document verification.