how do I attach a W2

[CLP2021]

When I click the transmit button this message comes up.

We can't e-file your return because we are unable to locate the attachment at W-2.

Please go back and re-attach it.

How do I do that?

[SweetieJean]

You don't attach a W-2 to an efiling.  Rather, the W-2 info that you enter or imported into the program goes to the IRS as part of the electronic file.