The IRS rejected your tax return because the Identity Protection Personal Identification Number (IP-PIN) you entered was not valid.
Go to this IRS website to retrieve your IP PIN - https://www.irs.gov/identity-theft-fraud-scams/retrieve-your-ip-pin
To enter, edit or delete a 6 digit IP PIN
Click on Federal Taxes (Personal using Home and Business)
Click on Other Tax Situations
Scroll down to Other Return Info
On Identity Protection PIN, click the start button