Please try the following the steps below to delete the duplicated W2 so the system will stop asking for the info. 

To Delete an Extra W-2:

1.   Go to "Federal Taxes" at the top of the screen.
2.   Select the "Wages & Income" sub-tab.
3.   Select "Start/Revisit" next to "Wages and Salaries".
4.   Select "Delete" next to the W-2 you would like to remove.