At an absolute minimum, the property itself is entered in the Assets/Depreciation section. Based on the data you enter, the program (not you) will figure the depreciation for you.
Depending on *your* specific situation, the property may already be listed in the Assets/Depreciation section. If it's not, then click the Add an Asset button and enter it.
COST - What you paid for the property in it's entirety.
COST OF LAND - How much of the above total COST you paid for the land.