Found instructions posted by Intuit that are even easier. I have tested them with my filing (while my residency is listed in the s/w as CA for the whole year) and they worked:
Using TurboTax Desktop:
Open your tax return and go to Forms Mode.
In the list of forms, locate the California Information Worksheet.
Under Part II—Main Form, check the box next to the Form 540NR-Nonresident of Part-Year Resident Income Tax Return.
Once done, go back through the interview and go back through your California return before filing.
