Hello,

Hope you are doing good.

Below I have mentioned the eligibility criteria for NDA 2021:

• Should be an Indian national

• The candidate should be an Unmarried male

• Minimum education qualification required for NDA is 10+2 (Army), 10+2 with Physics and Maths (Air Force & Navy)

• Candidates should fall in the age group of 16.5 and 19.5 years

So by the time you complete  your B.Tech you would have crossed the maximum age and would not be an eligible candidate.  So I would suggest you to try now itself.

Hope this helps

Good Luck