I was sent a IP PIN by the IRS to use on my tax return. But the turbo tax forms did not ask me to enter this number. Where can I enter my PIN?

If you have a 6 digit PIN issued to you by the IRS you need to enter it in order to e-file.  Go to Federal>Other Tax Situations>Other Return Info>Identity Protection PIN and enter the six-digit 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

Or enter ip pin in the Search box located in the upper right of the program screen. Click on Jump to ip pin