My employer sent me an incorrect W2. I then received a W2c. The W2c has empty fields that are filled on the W2.
For example: Box 16 has previously reported and corrected. But Box 17 is blank.
My employer suggested filling with both the W2 and W2c.
However I found Turbo Tax support saying to ignore the W2: https://ttlc.intuit.com/questions/3840480-hey-i-got-a-w2-and-a-w2c-do-i-need-to-input-both-the-w2-and-the-w2c-or-just-the-w2c-information