Unfortunately there is no exams for female to join IAF after 12th only males are allowed to give NDA exam.you can join IAF after graduation / equivalent exam with Physics, Chemistry, mathematics and English with a minimum of 50% marks in aggregate, and 50% marks in English.after that you can apply AFCAT exam which recruited for air force conducted by SSB.

To know more about AFCAT

https://competition.careers360.com/exams/iaf-afcat/amp