My experience was that when several of the fields associated with my W-2 were blank, I had inserted zero on the associated TurboTax fields instead of leaving the turbo tax fields blank I received the W-2c message; I knew in my case that my W-2 was identical to the same one from last year and suspected a TurboTax bug. I was able to call TurboTax support; after three attempts I was able to reach a TurboTax support person who asked me to remove the zeros in these fields; when I left these fields blank, the problem went away.
Meredith
