Hello,

If you have cleared your 12th in the year 2018/2019 or appearing this year then yes you can appear for JEE Mains.

So check the eligibilty criteria for that.

for taking an admission at IISc you have to clear JEE Advance. Using jee main you can go for NITs,GFITS. or other state government or private colleges.

It totally depends on how you score in both the jee exams.

Hope it helps!