Nothing for 2016 should on a 2015 W-2. Like I said, it cannot be a negative number. The W-2 is wrong if it incudes 2016. , however code DD is informational only and makes no difference whether it is entered or not. The intent of code DD is part of the ACA (Obomacare) and is simply to notify the employee how much the employer pays for their health insurance.
When you say "client" - you are not using TurboTax to prepare tax returns for clients are you? That violates the license agreement and IRS regulations for self prepared software.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
