I'm in CA too. I have an old note that says.....but this is probably for the Desktop program.
To apply a California refund to next year open your return and click on the State Taxes tab
Click EDIT by California
Select Continue on the next screen that says Your 2014 California Return or says You've Finished your California Return
If you don't see either of those screens then continue though all the screens until you see one of those pages
Then when you get there
Click the second circle for I've made Federal return changes let's go over California one more time
Continue though many many screens (I had 15 screens) and you will finally come to Apply Refund to 2023 Taxes (if you haven't found it before).
