From the CA -BRN
U.S. GRADUATES OTHER THAN CALIFORNIA:
• If you are a graduate from a U.S. school in a state other than California, transcripts are required
from all colleges and/or universities you attended that reflect courses required for a degree in
nursing, including general education course requirements and all nursing courses. Transcripts must
be received and evaluated by the Board prior to being found eligible for the examination.
• Your education must meet the requirements for California licensure. If any deficiencies are
identified, you must complete the coursework prior to being found eligible for the examination.
I told my school I wanted to take my NCLEX in CA, I printed out the request for transcripts page from the board, and my school sent the transcripts. Fortunately, I wasn't the first student from my school to do that, so the process was smooth. From my understanding, when the first student from my school applied, the school had to send them information including course descriptions and requirements, program description, and accreditation information. But it was my school that did all of that, not the student.
You might find it helpful to go to the BRN website and download a copy of the application so you can get a better understanding of necessary steps.
Board of Registered Nursing - Licensure by Examination