In the PUC (Pre-University Course) section of the COMEDK counselling process, you need to enter details related to your Class 12th or equivalent exam marks card.

Enter the marks obtained in all the relevant subjects for your chosen engineering program.

Specify the board under which you took your Class 12th exam (e.g., CBSE, ISCE)

Enter the year you passed your Class 12th exam.

This depends on your board.

• For CBSE candidates, enter your Roll Number.
• For ISCE candidates, enter your Unique ID Number.
  
  
  Some boards (like CBSE) might have a QR code on your marks card. If so, there might be an option to upload the scanned copy of the marks card with the QR code clearly visible.
  
  https://engineering.careers360.com/download/ebooks/know-all-about-comedk-uget-2015
  
  I hope it helps!