This is from another TT help thread:
IRS Identity Pin is 1 Digit Longer than Turbo Tax E File Pin. An Identity Protection PIN (IP PIN) and an e-filing PIN are two different things. An IP PIN is 6 digits and an e-filing PIN is 5 digits. You get the IP PIN from the IRS and you choose the e-filing PIN yourself. The 5 digit PIN is a number you selected at one time when you were in the File section of the program. It will be used each tax year if you transfer the prior year tax return tax data to the current tax year. It is not a security feature to prevent someone one else from using your personal information to file a tax return.
IRS IP Pin-this is a safety feature so no one can file taxes under your name. You must create an account with IRS if you don't already have one and request an IP Pin. NOTE: YOU MUST GET A NEW IP PIN EVERY YEAR. You cannot look back to last year's taxes and try to use the same one (unlike the TT Efile Pin).
Entering your IRS IP Pin for E-Filing
You can't enter your IRS IP Pin in the E-File process at the end near your E signature or anywhere else within the E-Filing itself. You have to enter it in your personal information.
For example in Turbo Tax Online it's in the Other Tax Situations section of the Federal section. And in the Premier edition it's in the Other Tax Situations section of the Personal Info section. It is also in the Personal section of Home&Business.
