Actually that's not possible to change name once it get printed on any government exams espescially on 10th and 12th exam marksheets krishna so I think it's better you don't do this mistake again in any other exam and that might help not getting again a trouble like this.

Hii aspirant..

As you have not mention any specific School Board I am telling you about Central Board of Secondary Education CBSE board. The rules for other boards are quite similar.

Application for correction in name may be considered any time provided that the application of the candidate is forwarded with the following documents:

(a) Admission form(s) filled in by the parents at the time of admission.

(b) The School Leaving Certificate of the previous school submitted by the parents of the candidate at the time of admission.

(c) Portion of the page of admission and withdrawal register of the school where the entry has been made in respect of the candidate.

(iii) The Board may effect necessary corrections after verification of the Original records of the school and on payment of the prescribed fee.

(iv) Applications regarding change in name/surname will be considered where such changes have been permitted by a Court of Law and notified in a Government Gazette. In the event of Court of Judicature allowing the change of name of a candidate, the same shall be carried out by the Board after obtaining relevant documents concerning change of name published in an official gazette.

Hope it helps.