What are the things required while filling iit jam application form

see this

Active email ID. Active mobile phone number. A photo ID Proof. Caste Certificate (if any) Class 10 and 12th Marksheet and passing certificate. Graduation marksheets. Scanned ...

scanned photo , signature , basic information (name , address etc) aadhar card no. paper opted preferred center

yes , photo , signature , preferred center ,.. go through the iit jam bronchure carefully.. read all bronchure... I have attached bronchure...

marksheets of graduation or 10th and 12th

and caste certificate

adhaar number , mobile no.and email I'd..

first of all go through information Boucher and get information about how to fill form and which documents are required for that..and don't make a suggestion mistake.. good luck..