1. I don't think the 4562 is anything TT has you work on directly. They transfer the information you enter on the asset entry worksheets. It's just a means of reporting to the IRS that you've purchased something you are now starting to depreciate so when you sell they have their own record to depreciation recapture from. My 4562 from 2019 only has the structure component listed just like yours. Go find a Depreciation and Amortization Report that TurboTax prints every year for your records that has "4562" in the upper left hand corner, the one from 2014 will have the info on it, as will each one from the last 10 years you've owned the house.
2. I don't have anything on Line 8 either and I don't think I've had any 179 special election stuff with this house. This was a family property I inherited and was pretty much a money pit for the 5 years I had it so not a ton was invested other than what was necessary (but still cost a lot!!).
3. Ok, it sounds like you may be using an online version then which I have never used. I only use the regular desktop version because I check my forms constantly and having to modify them directly is not uncommon in more complicated situations. So I'm sorry I can't be of more help in that aspect! Hopefully someone from support will be able to help you with the online version because I'm more of a forms nerd :).
