@DavidS127 Actual
@AmeliesUncle Non-SSTBs do indeed phase out, from a QBI deduction of 20% of QBI to (25% W2 wages + 2.5% UBIA). SSTBs phase out to zero, that's the key difference. Turbotax does compute the non-SSTB phaseout correctly - it's just that the UBIA is much lower than it could be, because the home office portion of the house is not getting included. So the phaseout is much steeper than it ought to be.
