Hello,

I hope you are doing fine, Since You mentioned that you already appeared 3 times and failed all the time. In CBSE boards, you are allowed to reappear 3 times . Apart from appearing in CBSE Boards, you can also complete your 12th class from NIOS (National Institute of Open Schooling). The course is designed for those who have passed the Xth standard or equivalent examination from a recognized Board and would like to continue their education towards a Senior Secondary Certification, equivalent to XII standard.

I hope you find this information helpful. I wish you all the best for your future.

Good Luck