Hello Shiv

You can join for Btech After polytechnic. If someone have done diploma then he/she can get direct admission in 2nd year of BTech it is known as lateral entry course. Universities like JNU, Lovely Professional University, Anna University etc provides lateral entry programmes for diploma holders. So, you can check the other information related to it on the official website of these universities. As admissions is open so it will be good if you apply soon.