The problem is TT 2019 is not calculating the "California Carryover Worksheet" at all, including 9a.
So you have to enter the capital loss carryover manually in the worksheet using 2018's line 11 on Schedule D (540) based on my reading of the 2018 and 2017 tax year carryovers where that worksheet was in fact being calculated. That will then populate line 6 on Schedule D (540) for 2019.
