Code D in Box 12a of your W-2 is indicating that the amount listed is what was withheld from your wages and deposited in 401(k) account.
A 401(k) plan is a company-sponsored retirement account that employees can contribute to, The employee contributions reduce their income taxes for the year they are made, but their withdrawals are taxed.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"