I am not using Turbotax online copy. I am using Premier edition CD. There is no hyperlink allow me to "+Add another row"

To add an additional row to line 12 using TurboTax Desktop:  move the Box 12 scroll bar (on the right) all the way down to see the next available row.

There isn't "+Add another row" blue hyperlink under the first column. I am using MacOS. Maybe Turbotax Windows edition does not have this bug.

In order to input the 5th row of W-2 box12, I created another W-2. After everything worked out, Turbotax told me that I cannot use E-filling because this 2nd W-2's box1 is less than 1 dollar. So I have to delete this W-2 and try to figure out other way to input the 5th row of box 12. If I am told that Turbotax MacOS edition cannot solve this problem, that means I have to redo everything.

Edited 2/17/17: You can also click on "Forms Mode" (top left corner), select the W-2 you want to update, scroll down the screen until you see Box 12, place your mouse in the last completed number field, press enter to add a new line, enter your code and amount to add more than 4 rows in TurboTax Premier for Mac (Desktop).

Great job! It works.