Hi

As you have already completed your 10 + 2 in 2020 and as a dropper you need to choose code 2 .

This because,

Code 2 is for those who have already passed class 12th board examination, and this code can be used by droppers or by those who are pursuing a graduation course but  they don't have physics chemistry and Biology in their course or have completed graduation but don't have at least two of physics chemistry and Biology in their graduation.

Here's a short brief of Neet codes :-

Code 1 :- code 1 is for all those students who are going to appear for their 12th board examination in 2021 with physics, chemistry, biology and English.

Code 2 :- code 2 is for all those who have passed their 10+2 in the year 2020 or before with physics, chemistry, biology and English

Code 3 :- code 3 says it is for those passed their intermediate / pre- degree examination  in the year  with physics, chemistry, biology and English ,your physics, chemistry and biology should also contain practical exam.

Code 4 :- intermediate / pre - medical degree with Physics, chemistry and biology from a recognised board / university.

Code 5 :- code 5 is for all those who are doing BSc and has all the three of Physics, chemistry and biology in their graduation.

Code 6 :- code 6 is for all those students who have passed  BSc  with at least any two of following subjects :-

-) Physics,

-)chemistry ,

-)biology

Code 7 :- code 7 is for those who have passed their examination from foreign board which is equivalent of Indian 10+2 board.

For more visit

https://medicine.careers360.com/articles/neet-qualification-codes

Thank you