Unless you request a 6 digit IP PIN from the IRS for security purposes, the five digit PIN is self-selected---you can use whatever you want that you can easily remember.
If you want to file the return by mail attach the W-2 even though no tax was withheld. Nothing else to attach.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
