sir mera admit card me gendar change kr deya h kya abhi change hi sakta hai 12th bihar board exam ka h jo ke 3 feb se hai

Hii Fatima!
Sorry, but since the admit card has been released now, you will not be able to make the necessary corrections. You should have applied for corrections earlier itself. But still, you can give an application in your school through which you are registered to the bihar board of education and ask them to apply for correction procedure. They may help you with this.
Hope this helps.
Good luck!