Dear Meenakshi

Please give details as to which exam or state counselling you are talking about. Do you want to upload OBC NCL certificate for a state counselling of NEET 2018 or are you talking about exam other than NEET, i.e. AIIMS or JIPMER, etc. 

Once you give more details, I will be able to tell you how to upload the certificate. 

Good Luck!