To remove a W2 in TurboTax Online, follow these steps: 

• Sign In to TurboTax Online
• Click "Take Me to my Return"
• Click "Federal" from the left side of your screen
• Click "Edit/Add" next to the Job(W2) section
• Click the picture of the trashcan to delete the unwanted W2

Please comment below if this doesn't solve your issue so that I can assist you further.