Wasn't sure you saw the comments after the question was answered so I called Turbo Tax. My understanding is that TT can only use forms and worksheets provided by the IRS, so there's no blame with TT not being able to handle this. I was also told that I cannot e-file when there is an override (not an issue anymore).
Just to provide additional context, I found a very interesting discussion on this: <a rel="nofollow" target="_blank" href="
https://www.healthinsurance.org/faqs/my-premium-subsidy-is-dependent-on-my-agi-but-im-self-employed-...>
as well as a calculator to do the numbers that need several iterations as you described: <a rel="nofollow" target="_blank" href="
https://cims.nyu.edu/~ferguson/Calculator%20SE%20ACA.html">https://cims.nyu.edu/~ferguson/Calculator...>
Hope this helps others in the same situation!
