Hi,

The Registration for JEE Mains January session is expected to begin in December. This is a tentative date and it may change. In order to get admission into IIT, student need to clear cutoff of JEE Mains and should get good rank in JEE Advanced. JEE Advanced held after the declaration of Rank of JEE Mains. JEE Advanced usually selects top 2.5 Lakh students from JEE Mains to give the Exam.

I hope this will answer your query.

Thanks!!!!