I'm having the same problem and feel exactly the same as all other comments - instructions say 3-part, I purchased 3-part, and cannot get a good answer from IOP when and if it will be fixed.  AND...the forms don't fit the windows for any of the W-2 envelopes sold.  I've tried both print options and even the page with employee address at the top and instructions below won't fit properly into the windows.  Payroll is very due date/time sensitive so having a software problem that they can't tell you if or when it can be fixed is EXTREMELY frustrating.