Hi Sir, my younger brother studying in class 12th and he missed to complete JEE mains registration form this year?

Hello Deepika

Deepika no need to worry about that,  you should thanks to NTA that from next year onwards they have given you the opportunity to write the JEE MAINS examination twice in a year and for that your brother will also have the chance to attempt the JEE main in the April session for which the registration window will be open from February 8 - March 7th and asked him not to this opportunity as well.

All the best