Patent royalty taxation option requires electronic filing of prescribed form and compliance with prescribed data security procedures. Eligible assessees electing taxation of patent royalty under section 115BBF must furnish Form No. 3CFA electronically under digital signature or via electronic verification code, complete and submitted by the due date for the relevant assessment year. The Director General of Income-tax (Systems) shall specify procedures, formats and standards to ensure secure data capture and transmission and implement security, archival and retrieval policies for the form's furnishing and verification.