Get your taxes done using TurboTax

..or..do you mean that you have extra empty W-2 forms from prior years jobs that transferred into eh 2018 software?

IF so..just enter the one you actually have for 2018, and when you work your way out it with followup questions, there should be a W-2 table listing of the ones you didn't enter ...and you can hit the trashcan symbol by each one and delete the ones no longer needed.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*