How do I dispose of personal vehicle used for work purposes when I did not sell it?

I have a personal vehicle I am using for work purposes. In June of last year I purchased a new vehicle but did not sell the old one, I kept it for my spouse to use instead.

I need to add the new vehicle for CCA purposes?  How do I remove the old vehicle (it is still showing as carried over from last year, at what value) and then add the new one?