I ran into the same issue, a rejected eFile tax return - I had never had this happen in the 30+ years I have been using TurboTax (and its predecessor Parsons Technology). I was unaware of the need for the IP PIN as I never received CP01A notice by IRS. Luckily, both I (and my spouse) do have online IRS accounts (maybe this automatically assigns the IP PIN?), so I was able to quickly retrieve these 6-digit numbers (in addition to the regular 5-digit Self-Select PIN). Only by reading this thread did I understood where to enter. Thanks!
Very frustrating but finally resolved and the submitted tax return was then accepted. But I'm not pleased with TurboTax. I'm not sure why the software didn't prompt me for these?
