There is a way to make the adjustment on a Mac in Turbotax Desktop to eliminate the capital gain or loss for Ca state, if that is appropriate for a particular situation. Go to the the California Form D (rather than easy step) and to the left of Sales Price - you will see a little box to click on. Once you do that - the capital gain or loss amount will be deleted from the state return.
I have not tried it but you might be able to enter a different California basis for Schedule D gains and losses on that same form.
