I ran into same bug and was going to manually override like you suggested but upon researching further and checking
https://www.ftb.ca.gov/forms/2024/2024-5805-instructions.html
If the California AGI on your 2024 tax return is equal to or greater than $1,000,000/$500,000 if married/RDP filing separately, enter 90% (.90) of the tax liability from your 2024 tax return on line 5.
So you may want to check if that applies to you and the reason TurboTax is not entering 110% of 2023 and instead entering in 90% of 2024 on line 5.
