JEE Main 2021: Registration window for 4th session of exam to open today on jeemain.nta.nic.in Pixabay The registrations process for the fourth session of the Joint Entrance Examination (JEE) Main will begin today on jeemain.nta.nic.in. JEE Main comprises two papersâPaper 1 is for admission to undergraduate engineering programmes (B.E./B.Tech) at NITs, IIITs, other Centrally Funded Technical Institutions, institutions/universities funded/recognized by participating state governments, as well as an eligibility test for JEE Advanced, which is conducted for admission to IITs. Ending the wait of thousands of students union education minister on July 6 announced that the Joint Entrance Exams (Mains) 2021 will be conducted from July 20 to 25 and from July 27 to August 2.