I was able to print the W2's on the four part paper, however, the top page for each W2 is formatted to print on 3 part paper, so if I fold it in half to fit into the envelopes that were sent with the four part forms, nothing lines up.  I ordered the 4 part forms from Intuit and they sent size A9 envelopes to go with the four part perforated paper.  I'm pretty annoyed right now.