Taxpayer has three dependents.  E-filing was rejected because: "The Dependent/Qualifying Person Identity Protection Personal Identification Number (IP PIN) provided on the filing is not valid."  Further, Reject Resolution:"The Identity Protection Personal Identification Number (IPPIN) must match the IRS e-File database.  Double check your entry and resubmit your filing with the correct number."

There were no IPPINs put on the tax return, so I do not know what is supposed to "match."

I will attempt to contact the IRS to see if I can get any help there.