Dear aspirant !

Hope you are doing good ! As 2027 is far away you should wait for some time . However the NDA criteria is given here ;-

Only unmarried male candidates between the age group of 16½ to 19½ can join NDA . 12 ^th Pass of the 10+2 pattern of School or equivalent examination by a State Education Board or a University.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://competition.careers360.com/articles/nda-eligibility-criteria&ved=2ahUKEwjGh_iqquCEAxWFs1YBHcy7BFsQFnoECBsQAQ&usg=AOvVaw3pM7wni1gi1UtkU0jR-JmX .

thanking you