For years now, there are no dependent exemptions on the Federal return, but CA still has deductions for them.

Perhaps insignificant to many, but the exemption amount for the taxpayer(s) is $149 and for a dependent $461.

For planning the following year's estimated tax payments for CA, one can override the number of exemptions in the case of a deceased spouse or a change in dependents. There should be a diagnostic in the case of a deceased spouse but there isn't one for number of dependents going down. 

Go to Estimated Payments screen  [7.1] and scroll down to CA Adjustments...enter the revised number in the field "Exemption Credits".