Update... I called the IRS today to ask how to get their permission to change my AMT calc. Very nice IRS lady made inquiries for 15 minutes and concluded that no-one there knew how to do that. She said there is no-one else to ask at the IRS and advised me to search IRS online docs. I explained again that those docs say I need IRS consent to change the AMT calc and she agreed that no-one at the IRS knew how to do that. At that point she said I should ask my CPA. So the last TT CPA I talked to advised me to change the AMT calc (since it doesn't change my tax owed or paid), so I can e-file, so that's what I'm doing. And if the IRS Audit me, I will ask TT to share this post with them in my Audit Defense!
