hi,

see generally once the examinations over, the admit card may not available after 2-3 months at the official portal. officials portals are for advertising latest notifications so, you may not able to download your certificate again from the official site.

go through the below mentioned link and check if any link for admit card of NTSE Stage 1 is available or not.

https://nts.mscescholarshipexam.in/

you may contact with help desk for exam related query and next possible steps to be taken:

Help Desk Toll Free No. : 1800-267-2233