There are not many documents required to fill the online application form, you only require :
1. 12th Board Roll No.
2. Aadhar Card No.
3. Year of passing
4. Family income (certificate will be verified later)
5. Domicile
but after filling the application form You need to be ready with your documents as you have to verify them in the facilitation centers near you.
Check all the documents which are required in the facilitation center
