Hello there,

If the IISER admission portal is not allowing you to proceed without submitting the 12th marksheet, you can try the following:

1. Check for a Provisional Option: See if there's an option to upload a provisional result or a self-declaration stating that the result is awaited.
   
   
2. Contact IISER Helpdesk: Reach out to the IISER admission support team through the contact details provided on the official website for guidance.
   
   
3. Try Uploading a Blank Document: Some portals allow submission by uploading a placeholder document (like a blank PDF) until the result is declared.
   
   
4. Wait for Result: If none of the above works, you may need to wait until the 12th result is declared before proceeding with the application.

I hope this answer helps you. If you have more queries, then feel free to share your questions with us, we will be happy to assist you.

Thank you, and I wish you all the best in your bright future.