If you passed Class 12 in 2025 and are now appearing for improvement as a private candidate in 2026, then for any official forms or applications, your name of institution will remain the same school from which you originally passed in 2025, and the address should also be that of the same school.

Even though you are appearing privately in 2026, your original passing record is from your 2025 school, so that’s what you need to mention. The private improvement attempt doesn’t change your original school name or address.