My wife's W2 has 4 separate boxes. I always thought these were all the same.
Top left has "employee reference copy" and then there are three copies along the bottom.
All info is the same, except for box 12. 12a and 12b show different amounts in the bottom right two boxes than the top left (reference copy) and bottom left show.
These are C and D letter codes (life insurance/401k)
What does this difference mean and how do I report it? Thank you
