How do I enter W2 box 12 code D if it has prior year contributions? For example: DD $xxxx D 16 $xxx D $xxx

[Critter · Accepted solution]

Do not enter the date/year ... just the code D. 

[hansstev]

What if including the prior year amount takes you over the annual contribution limit for the current year?

[Critter]

Then do not enter the prior year amount ... it has nothing to do with the current year return anyway.