Print the worksheet to paper or a pdf. Then go ahead and delete it. Save the printed copy for the day that property is sold. It doesn't really serve any purpose lingering around.
and ex marks the spot where those rocks and anvils hit me.
I code it to form 17 4562 only then I put a 99 for depreciation so it no longer calculates depreciation. Those then print out every year with the clients tax return, that way if they move or use a different preparer that tax preparer has that information. That great if you just print a copy and keep in your file, but in my office I have had them purge files including the back-up accidentally.