Hello Manas,
Provisional JoSAA Seat Allotment Letter 2020
3 passport size photographs
A valid photo Identity Card
Original JEE Advanced Admit Card 2020
Proof of Seat Acceptance fee payment ( the e-challan )
Proof of Date of Birth
Class10th and 12th (or equivalent) Mark Sheet and Certificate
Category Certificate (if needed)
Medical certificate/fitness certificate
Registration form with Locked Choices for Seat Allotment
You may use the below link to know more about the process:
https://engineering.careers360.com/articles/josaa-counselling
All the best
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