Dear Aspirant,

First of all congratulations  you have got very good percentile. 98.8 percentile means your AIR would be less than 29k which is very good sign you can easily get a seat in any NIT with any core subjects .  Don't bound yourself by just focusing on NIT's  try to focus on advance parallelly there are high chances for you to get into any top IIT's. Wish you a good luck hope you do your best in JEE-Advance.

ALL THE BEST.