After you are finished entering the first W-2, you should have the option to enter another at the summary page. You can use the steps below to get to your W-2 Summary and enter another W-2.
To Add Another 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 "+Add another W-2" in blue
For more information visit this link:
Form
W-2