JNU Application form is not announced yet but the exam tentative dates are announced which is 27-30, 2018. You can also prefer the below given link.

https://admissions.jnu.ac.in/Pdf/RevisedAdmissionsNotice_DG_Oct242018.pdf

You can also check the Masters programme of JNU with the given below link.

https://www.jnu.ac.in/academic-masters-program

Good Luck!