@Drindin wrote:
Is it that the TurboTax platform faces technological challeges to integrate the case, or it is the case that such a case is invalid per IRS regulations.
It appears to be a TurboTax programming issue. An installment sale is permitted given your scenario just not, as @Critter mentioned, for recapture of depreciation (i.e., the depreciation component of the gain).
See https://www.irs.gov/publications/p537#en_US_2018_publink1000221670
