Om, lets say you appeared for your 12th from GSEB in 2020 and you are appearing for NEET 2020, your code will be 02. This is because you completed your 12th. But if you still have to appear for your 12th exams in 2020 and you are appearing for NEET 2020, your code will be 01. This is because you are appearing for your qualifying exams. To help you with your NEET preparation, we have NEET Knockout packages that you can check at: https://learn.careers360.com/knockout-neet-may/. To help you during admission and counselling, we have https://www.careers360.com/mbbs-companion.