The property was sold in 2021. Is there any way to add the land value now to include in calculation of Cost Basis?
There's a work-a-round of sorts. What you do is add the value of the land to the figure already in the "COST" box. Then enter the value of the land in the COST OF LAND box. Since land is not depreciated, doing it this way will not screw up your depreciation history.
Also, where to add the expenses, related to the original purchase of the house?
You "should" have already claimed those expenses either in the year you purchased the property, or in the tax year you converted the property from personal use to rental use. You can't claim them again. If you didn't claim the original acquisition expenses in the tax year you were allowed to, then you can not claim them in a later year, including the year you sell the property.
