You may be able to get the penalty removed for reasonable cause.
First you would need to pay the tax due including penalty and interest. The you would file form FTB 2917 to see if they will waive the penalty and sent you the money back.
Here is the link to the form https://www.ftb.ca.gov/forms/misc/2917.pdf
**Mark the post that answers your question by clicking on "Mark as Best Answer"