To obtain copies of W-2's, 1099's from WI is done online.
This was formerly form P-521.
(1) Go to My Tax Account homepage, (link listed below) but do not log in.
(2) Click "Quick-Links" in the center, top portion of form.
(3) In the first column labeled business taxes, click "Request Tax Record Copy"
(4) Enter the required info
Click here for "My Tax Account Homepage"