If your wife doesn't work, why are you filing separately? On a joint return, you get double tax benefits while adding no income on her part.
A separate tax return in a community property state is complex, and you do need to allocate half of your income to her return if its considered community income. This is not done by entering a W2, but is done in the Community Property form (8958) screens. If she has no income under her name, she would proceed right to these screens.
Turbo Tax recognizes the need for community property questions based on filing status and selected resident state.
