No. You don’t need to upload your OBC-NCL certificate at the time of applying for JAM examination. Category certificate is required at this stage only to claim the concessional rate for the application fee. The rank list will be prepared based on the category declared by the candidates in the application form.
However, you have to submit the OBC-NCL category certificate in the prescribed format along with other required documents when you submit your application form for admission after the declaration of JAM results. The final seat allotment will be done based on the OBC-NCL certificate submitted along with the application form for admission. Please refer to the Information Brochure for more information.