If you failed to enter the IP PIN before you filed then expect the return to reject ... then you can fix your error and file again.
If you have a 6-digit IP PIN to enter, here's where to enter it.
· FEDERAL TAXES tab. (or Personal tab in Home and Business)
· Then sub tab "Other Tax Situations."
· Scroll down to "Other Return Info".
· Find subtopic "Identity Protection PIN", and click START.