Hi there. 

The applications for JNU 2019 batch haven't released yet. The tentative dates were of October but official dates are not released yet.

I would suggest you to follow their official website to not miss any updates from their end. 

For more relevant information please refer to the following link: 

https://www.google.co.in/amp/s/university.careers360.com/articles/jnu-application-form/amp

Wishing you luck!