How do I adjust HSA contribution paid by TX employer on CA return?

I relocated from California to Texas in Aug 2018.  My new employer in TX has an HSA and my employer in CA did not have an HSA.  How do I back out the contribution to my HSA on my CA return?  This income should not be taxable in CA because it was sourced from my TX employer after I relocated.  TurboTax will not let me edit the HSA contribution on the CA state return.  The field is not editable.