I am in B.Tech 3rd year and now I want to join India Air Force and for that I want to get the details of process to join India Air Force after B.Tech so can you provide me that?

As you want to get the details of joining India Air Force so here is the information of the same for you:

As you are in B.Tech 3rd year then you can apply for the Indian Army University Entry Scheme

Eligibility Criteria:
Age:
Candidates must have the age between 19 and 25 yrs as of first day of month in which course is due to commence

Qualification:
Candidates must have been in Pre Final year students of Engineering Degree Course

Marital Status:
Un Married

Likely SSB Date:
Jul/Aug during final year

Date Commencement of Training:
Jul at IMA Dehradun

Vacancies Per Course:
60

There is one more option that is the exam of CDS after the exam of B.Tech 4th year