Thanks @PaulaM .
Unfortunately, Form 4562, Part III, Section B, column (c) "Basis for depreciation" shows only the basis of costs capitalized after rental property acquisition (e.g. basis for a new heat pump).
The real estate / rental property basis is not visible, and for the rental property, I have only a value in Section A, Item 17 (which is only the most recent year of depreciation, not the basis or any prior year depreciation).
Ben
