Before making any changes to the federal or CA returns, Open the CA state form, at the top of the Form 540 is a box to check if its an Amended return.

Click Forms on the top menu bar and type in  X the Schedule X will come up.  Type the Tax Year in the space at the top of the Sch X form.  Now go back to the federal and make your changes, Then go back to the Schedule X, it should be filled out with the corrected information.

I learned how to do this reading the HELP file in the program.  Just click that yellow ? on the toolbar when youre in a form that you need help with.