It is unlikely you need to file at all. You do not need to file a California income tax return if your income in California was not greater than the filing threshold.
The income thresholds for 2018 are
- Single with a total income from CA sources of $17,693 or more
- Married with joint income from CA sources of $35,388 or more
If you income for December does exceed the above amounts, you will file a California Part Year Resident Tax Return to report the income you made in California.
For more information about this return, follow this link: CA
Non-Residents and Part Year Residents
