Sounds like you're not saying the computation of percent of business use is wrong, but rather that the number for percentage of the year I owned the asset is wrong.
But I think it's doing that more or less correctly. Placed into service April 29, and there are 105 days between beginning of year and April 15, so should've said I owned it for (365-105)/365 = 0.712 of a year. That's a lot closer to 0.7083 than if it used April 29.
I'm just gonna accept Turbotax's answer and keep my fingers crossed. Paid for the bloody program ...
