State takes admission through LEET counselling for B.tech degree lateral entry and all states have different process for lateral entry admission.

NITs don't take lateral entry admission, To appear in JEE (Advanced) a diploma holder can apply in JEE (Main) 2017 but  his/her  rank  and  score  for  JEE  (Main)  will  not  be  declared  as  diploma holders  cannot  apply  for  admission  in  NITs  and CFTIs  through  JEE  (Main) channel.

Good Luck.