Hello,

A qualification code is a code that helps NTA identify your educational qualification.

• Code 1 :  Candidates appearing for Class 12 or waiting for the result
• Code 2 : Candidates who have completed their Higher/Secondary examination
• Code 3 : Candidates  who have passed their Intermediate/Pre-Examination degree in Science stream
• Code 4 : Candidates who have completed class 12 and  pre-professional/pre-medical examination with Physics, Chemistry, Biology/Biotechnology, and English
• Code 5 : Candidates who are in the first year of B.Sc. or similar course 3 year degree course
• Code 6 : Candidates who have passed their B.Sc. Exam with the PCB subjects
• Code 7 : Candidates studying in any other educational board which is equivalent to 10+2 of Indian education system

You can check the link below for more information

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