GST enrolment requirements: application fields, Aadhaar authentication consent, principal business details, documents and verification needed. Application for enrolment under GST requires legal and trade names, PAN, Aadhaar for proprietorships, selection of enrolment type, business constitution, full particulars of principal and additional places of business, contact details, nature of premises, upload of identity and address proof, explicit Aadhaar consent for UIDAI authentication by the Goods and Services Tax Network, and a verification declaration with authorised signatory signature; office fields include enrolment number and date.