i am a polytechnic student can i write JEE mains?

Hi Sudarshan,
Yes, polytechnic students can write JEE mains.You have to pass JEE main and should clear JEE Advanced to get admission in IITs. So if you clear the JEE advanced exam only you will get chance for IIT. So good luck.
Thank you

Yes, ofcourse you are eligible for jee mains in your final year of diploma.also you have options to switch your branch .so try to get more mark for good college with good branch.

You can apply for jee mains exam when you  have passed intermediate or equivalent course of 10+3 which includes your completion of diploma. The government now considers diploma completion equivalent to 12th standard completion. Only then you can apply for jee mains and once you clear jee main, you will have to write jee advanced, only then you can get a seat in IIT, if you only complete jee mains, there is no eligibility even to get a seat in NIT or CFTI(central funded technical institute), after sucessful completion of jee advanced, you will get a seat in IIT in the 1st year, not second year, as IIT don't consider the method of lateral entries like ordinary engineering colleges.