W2 Box 15 data keeps disappearing

I received a W2 from a lawsuit settlement that only has data in boxes a, bMy W2 has data in boxes 1, b, c, 14 and 15. Turbo tax is not allowing a blank box 1, so I put $0 there. Box 14 is just "CA SDI $x.xx" and box 15 is "CA xxxxxxxx". Whenever I fill in box 15 in TurboTax by picking "California" and typing in the state ID, it erases the fields. How do I enter this information properly?

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