Hey Arjun,
First you need to qualify jee mains for applying for jee-advance exam , hope you have applied for mains ,all the procedure to apply for jee advance will be available on the official website.
Good luck !!

It is expected that JEE Advanced application form will be tentatively out in the first week of May 2018. 

 

To know in detail regarding application form you can refer below link

https://engineering.careers360.com/articles/jee-advanced-application-form

 

Good Luck!!

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