Hello,

No you cannot apply without your 10+2 level hall ticket for Joint Entrance Examination Mains. The documents required for filling the JEE main application from are

• Scanned images of photograph, signature and Class 12 hall ticket
• Marksheet of class 10 and 12. Candidates who are appearing in class 12 have to enter details as per their class 12 hall ticket
• Category certificates (If belonging to reserved category)
• Debit card/Internet banking details for payment of application fees
• Photo Identity proof such as Aadhaar, Bank passbook, Ration card copy etc.

So without the 10+2 level Hall Ticket you cannot fill the application from.