You cannot add anything to a return that has already been e-filed. If you were supposed to include a six digit IP then the e-file will be rejected. When it rejects, you can then add the IP pin and re-file it. But you will have to wait until the IRS begins to reject/accept e-files---they start on January 29.
Do not try to change anything on your return while it is in pending.
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.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
