My son has received a corrected w2 from his employee. Taxgirl says:If an employer makes a mistake on a form W-2, the employer will issued a corrected form W-2, called a form W-2c, Corrected Wage and Tax Statement. The form W-2c can be confusing because it includes the original (incorrect) amounts, as well as the corrected amounts. If you have not yet filed your tax return, just use the corrected amounts as reported on the W-2c on your tax return. For more on understanding your form W-2 - including a list of box 12 codes - check out this article.

Source: Forbes February 21, 2018 18:56 UTC