See https://ttlc.intuit.com/community/taxes/discussion/where-do-i-enter-the-ip-pin-for-a-dependent-on-a-...
The regular Efiling PIN is 5 digits and will be encountered during the process of efiling.
If you have a 6-digit IP PIN to enter, here's where to enter it.
· FEDERAL TAXES tab. (or Personal tab in Home and Business)
· Then sub tab "Other Tax Situations."
· Scroll down to "Other Return Info".
· Find subtopic "Identity Protection PIN", and click START.
