You enter the state withholding on the Tax Payments worksheet for Federal.    That gets it to Sch A.

Now go over to the CA return and in the list of Forms find the 593, and fill it out, that will put it on the correct line of the 540 and allow for Efiling.  DO NOT enter the withholding on the 593 withholding line of the 540 (doing that makes it unable to be Efiled), you have to complete the 593 and then it will flow automatically.