Hi

No, your marks in 10+2 or HS is not taken in account for IIT JAM eligibility

To be eligible for IIT JAM examination for MSc physics you need to hace studied  Physics for at least two years or four semesters and Mathematics for at least one year or two semesters in your graduation  and must have got at least 55% or 5.5 CGPA in your graduation if you belong to general or obc category and at least 50% or 5 CGPA in your graduation if you belong to Sc or St category. So if you fulfill this criteria then you are eligible for IIT JAM for Msc physics

For detailed information go through

https://university.careers360.com/articles/jam-eligibility-criteria

Thank you