Congratulations shivam.

The documents you need to submit in the college are :

• Privisional JOSAA seat allotment letter of 2019
• passport size photographs as on mains application form
• Candidate undertaking
• Proof of seat acceptance fee.
• JEE main score card
• JEE main admit card
• Class 10th mark sheet or date of birth proof
• Class 12 mark sheet
• Medical certificate
• Valid photo identity card
• Registration and filled choices for seat allotment
• PwD certificate (if applicable)
• Category certificate (if applicable)

Hope it helps.

Good luck