Nope.....sorry but the What-IF is only applicable to the Federal part. ( I'm guessing that trying to do the software to create a different What-IF sheet for each state would likely require massive resources )
What you can do with the 2019 desktop software, is save your actual 2019 tax file to differently-named tax file, like "Pseudo_2020_Test" . Then modify each of the Federal sections to mimic what you expect to be the case for 2020. Then when you go to the CA section and work thru it, the software would use 2019 CA tax settings, but it would likely be pretty close to what 2020 would show.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
