Duplicate box 12 code on 2 W-2s

[Greg V75]

I received 2 W-2s from the same employer.  Boxes 16 & 17 were blank on one.  Codes C and D were for different amounts between the two W-2s.  I tried entering code C and D twice with the different amounts but TurboTax asks me to delete the duplicate box 12 codes.

[rjs]

Is one of the W-2s marked "corrected"? If so, use the box 12 entries from the corrected W-2 and ignore the box 12 entries on the other W-2.

If neither W-2 is marked corrected, you should ask the employer to explain why you got two W-2s with different amounts, and which one is correct.