hi,

see you may enroll for nios i.e national school of open schooling to again pursue 10+2 course. however its a long time already passed and since you have completed graduation, you may be now doing job or higher study. so you need to think why you want to again go for 10+2 course, what is your life purpose, what actually you want to gain in life. syllabus has changed and it would be challenging to again pursue 10+2 course.

hope you understand.