W2 Box 12a - 12d are just the box numbers.They don't have to be filled in.But if they have a Code (1 or 2 capital letters) and amount you need to enter it.Don't confuse the lowercase letters a-d with the uppercase Codes A, B, C, D, DD, etc.The lowercase a-d are just part of the box label. You don't enter them.You can enter the Code and Amount in any box 12.
TurboTax Expert Assist
Get answers to all your tax questions
Our experts are available on-demand, no appointment needed. Get help all year long with TurboTax Expert Assist.