Are you saying the asset is fully depreciated for CA and not for US? Just to the right of the Prior Depreciation input is a column for St.(if diff) (-1=none), put the state amount of prior depreciation. 

IF YOU JUST WANT TO FORCE IT (BAD IDEA) then there is an input for Current depreciation/amortization (-1=none)[O]. The [O] means Override and this is typically NOT USED in Lacerte. In Lacerte zero (0) for an input is almost always ignored by the program being equivalent to a space or nothing. If you want a zero (0), then Lacerte uses a -1 (minus 1). Weird, but it works.