Employers can put just about anything in box 14; it's a catch-all for items that don't have their own dedicated box on the W-2. In TurboTax, enter the description from your W-2's box 14 on the first field in the row. Enter the dollar amount and select the correct tax category that goes with that description. What you enter for the description will have not impact on your tax return. I suggest you put something like "Imputed Vehicle Protection".
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