Tom...thanks for your response.  The concern is that I did enter in the quarterly State payments in the fields when I was doing the Federal side of the return....TurboTax asked for both Fed and State estimated payments made, and I entered them.  I worry there is a "bug" in the program...that the carried-forward refund is overlaying my hand-entered information, rather than adding to it.  I tried entering in larger quarterly payments, but it didn't effect the running total of "Tax Owed" on the State side.

I just entered them and it worked OK  (Online Free version).

Had one other person last week who had that same issue...but their "Head Slap" was that they didn't select "California" as the state for each quarterly payment...go re-check that state selection for each of those payments.

Also, in the main Estimates section, there is an "Other Taxes Paid" part where you enter your 2017 state Refund applied to 2018.  Don't put that one in as a Quarterly estimate.  Some people do both (both a rollover, and a separate 1Qtr est) so two separate entries are needed