Since the Surface Laptop is being awarded as a hackathon prize and not purchased for resale, I would first ask the organizer/sender for the exact Surface model number/SKU and its BIS CRS registration details.
You generally cannot obtain the BIS registration yourself without knowing the exact model. Once you have those details, provide them to the courier/customs along with the hackathon prize/award letter and invoice or proof of value.
I would also ask Customs/courier to confirm exactly which BIS document they require for this personal prize shipment.
The BIS registration belongs to the manufacturer/product—not to you personally. BIS's CRS is the applicable scheme for electronic/IT products such as laptops.
If it is coming by FedEx, DHL, UPS, etc., the authorized courier handles the customs declaration/clearance process through the Express Cargo Clearance System. CBIC confirms that authorized couriers file the appropriate electronic Courier Bill of Entry for imported consignments.