I am using the downloaded version, Premier for Mac.
Wondering why was a new thread started though, with me asking the same question (I didn't do it ) ?
Good news though, I checked "use IRS tables for MACRS property" on the "asset worksheet" and it's now doing the right thing - IOW, not attempting to do this "catchup" depreciation on account of the business use being higher this year - and instead simply multiplying the basis by the business percentage and the figure from Table A-6.
There's one more thing though. In my OP, I did not mention another asset, some land improvement that cost $3000 and was done last year (put into service July 6) when my business percent was 47.62%. And I got "special depreciation" for $1429 (which is 47.62% of $3000). I checked "use IRS tables" for this one, it's giving me $69 depreciation for this year . It says my depreciable basis is $731, which is indeed the difference between 47.62% and 72% of $3000, and the lifetime is 15 years. So that kinda makes sense. It also says the method "150DB/HY", which apparently means "150% declining balance method, half-year convention". Which is Table A-14, and indeed the figure for 15 year lifetime and year 2 is 9.5%, which gives $69. So I think everything is making sense now.
I think the bottom line is, if your business-usage percentage is going to change from year to year, be sure to check the "use IRS tables for MACRS property" on line 43 of the asset entry worksheet. Which I believe can't be done in Turbotax's interview, instead you have to go to "Forms" and find the asset entry worksheet(s) there.
