IT is very simple First you go for any Engineering college  Instituted counselling where you want admission then. They should provide you admission form where you fill your detail and registration your form. You need some document like TC, 12th mark sheet, Jee main score and any other document which they want then you should get the admission that its.

GOOD LUCK

Hi Navya,

See if you want to take admission in good private colleges than some of the top private institutes participate in SFTIs in CSAB which includes institutes like Amity, Galgotias, G.L. Bajaj etc. Some even have application forms on their official website which you can fill to apply for the Under Graduate course. The procedure that follows this is pretty general which includes document verification, paymentof the fees etc. 

Good Luck !!

Hey Navya,

If you've qualified jee mains you would have given advance and you marks in that decide about your admission in IIT. If not IIT, the NITs take admission on the mains score but for that yours should be good. You can get into private colleges by applying and giving your mains marks.