Many times someone else comes in and buys the practice. If there is anyway you can get the detailed depreciation from the estate or new preparer it would save you a lot of time.
If that is not possible you will have to reconstruct it, the best you can.
In 1997 Residential real property had a 27 1/2 year life. So $1,818 a year would be $49,995 for a building (excluding the land).
This link it is the 1997 depreciation guide from IRS.
https://www.irs.gov/pub/irs-prior/p946--1997.pdf
You would enter the Asset in TurboTax as acquired in 1997 and the cost, and accumulated depreciation taken.
