What the Form W2 Box 12 Codes Mean | H&R Block
On the W-2 form, box 12 has a number of sub-categories ranging from A to HH. Long story short, the W-2 box 12 codes provide more information and determine if the amount is income. However, if any amount is gross income, it's already included in W-2 Box 1. Each W-2 Form box 12 code is either a single or double letter code. Instructions for box 12 on W-2. It's important to understand the instructions for box 12 on the W-2 …