The search answer is totally wrong. Get it together Intuit!
The actual answer: Intuit uses "Info Works" forms that transfer the data to the actual IRS forms.
Go to forms view.
Scroll to the top of the list of your forms to the 1040 forms.
You will see 1040wks
Below that you may see schedule 1, 2, 3 etc.
Then just below that you will see "Info Wks"
Open the 1040 Info Wks form.
Scroll down to Part VII
Just below the Part VII heading you will see "Identity Protection Pin"
If you or your spouse have received an IP Pin. Enter it here.
The data entry will be transferred to you return for efiling.
In my case I had not received an IP PIN from the IRS but my return was still rejected. So I set up an IRS identity account and got an IP PIN. That corrected the efile problem.
