Investors & landlords
Based on my calculations (along with Carl and tagteam) and the depreciation table in the IRS Publication 946, the TurboTax calculation is correct.
Your equipment is in the sixth year of depreciation and was placed in service during the 4th quarter. Therefore, based on the depreciation table in the screenshot below, the percentage to use is 8.73%.
For your reference, the depreciation tables are found toward the end of the document: IRS Publication 946
See the picture below for the table used for your mid-quarter convention, 4th quarter placed in service asset:
