DonM94556,
https://www.ftb.ca.gov/forms/2022/2022-5805-instructions.html does list the way to request a waiver via form 5805 which one may optionally use to hopefully reduce or eliminate underpayment penalties and interest. I don't know how to access this form using TurboTax online, but if you are using a desktop version, you switch to Forms view, click on Open Form, and type 5805 in that search box. (There is a procedure to buy a desktop version and transfer your online TurboTax info to the desktop. You then use the desktop version and do not efile with the online one, i.e. stop using the online one.
