What TurboTax is reporting will meet the requirements. You are referring to the Special Deprecation Allowance currently available.
Form 4562, Part V, page 2 will include these details in columns (d) Cost or other basis and (e) Basis for depreciation for Listed Property.
Otherwise, keep your receipts and document the reduction in the business records.
For more information, see: Publication 946 How To Depreciate Property.
What is depreciation?
How do I handle capital improvements and depreciation for my rental?
@Anonymous
