Hello aspirant

Hope you are doing well.

You should fill code 2 if you have passed 12 th exam this year

Here is the list for the codes acc to different qualifications.

Code 1 : This code can be selected by aspirants who will be appearing for Class 12 or waiting for the result. However, students must furnish the relevant documents as evidence of qualifying for the exam after the announcement of the result.

Code 2:

• Candidates who have completed a period of 12 years under Higher/Secondary examination or the Indian School Certificate Examination (ISCE), which is equivalent to Class 10+2 can opt for code 2. However, the last two years of study must include English, Physics, Chemistry, Biology/Biotechnology, or Mathematics or any other elective as a major subject as prescribed by the National Council of Education Research and Training (NCERT).
• Aspirants who have passed 10+2 from the National Institute of Open Schooling (NIOS) or state open school, as a private candidate from state boards; with Biology/Biotechnology as an additional subject can apply under NEET qualification code 2.

Further details is provided in link below.

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

Hope it helps

Good luck