See for most of the colleges you need to have English as a compulsory language and Physics, Chemistry and Mathematics as subject in your 10+2. Now if you have appeared for entrance or applied for admission then if you have selected the option for appearing in 10+2 then you will be granted time to produce the certificate. Now if you have filled up that you have passed 10+2 then you have to submit the 2020 results.

To know more about Engineering you may visit the link below:

https://www.careers360.com/courses/engineering-course

I hope this answer helps. All the very best for your future endeavors!