I would think that you are filling taxes in CA you would know the basic rules. the following is from CA.gov.

Overview

Your filing status determines the rate your income is taxed. The five filing statuses are:

• Single
• Married/Registered Domestic Partnership (RDP) filing jointly
• Married/RDP filing separately
• Head of household (with qualifying person)
• Qualifying surviving spouse/RDP with child

Generally, you should file your state tax return using the same status as your federal return.

If you did not file a federal return because you did not have a federal filing requirement, you may use any filing status on your California return that you were entitled to use on your federal return had you been required to file a federal return.