UPSC publishes final marksheets on its website after the final result is declared.
Log in to the UPSC candidate portal using your roll number and date of birth.
The marksheet shows your marks in prelims, mains, and the interview separately.
It is usually available for a limited window, so download and save a copy early.
This marksheet is useful for future attempts and for record purposes.
UPSC does not send physical marksheets by post.