Will you please tell me the complete procedure of joining the Air Force after 12th????????????

You can join the Air Force after 12th through national defence academy which is conducted by UPSC twice in a year. It is being conducted for following wings:

1-indian army
2-indian navy
3-indian air force

Following are the details of this examination:
A candidate must be either be a
A citizen of India , or
A subject of Bhutan, or
A subject of Nepal, or
A Tibetan refugee who came ovbet ot India before the 01 January , 1962 with the intention of spermanently settling in India, or
a Person of Indian origin who has migrated from Pakisthan, Burma, Sri Lanka and East African countires of Kenya, Uganda, the United Republic of Tanzania, Zambia, Malawim Zaire and Ethiopia or Vietnam with the intention of permanently setting in India.

Sex:
Only unmarried male candidates are eligible.

Required qualification:
For Army wing of National Defence Academy:
the applicant should be 12th Class pass of the 10+2 pattern of School Education or equivalent examination conducted by a State Education Board or a University.

For Air Force and Naval Wings of National Defence Academy and for the 10+2 Cadet Entry Scheme at the Indian Naval Academy:
The applicant should be 12th Class pass of the 10+2 pattern of School Education or equivalent with Physics and Mathematics conducted by a State Education Board or a University.