I'll add the cost of improvements to the land, to the Total Amount Paid block. Do I get to add to that total, the total of the years of property taxes (and HOA) I paid?

[jpbarman]

I believe the cost of the years of paying property tax and HOA Fees detracts from any true potential gain from the sale.

[KrisD15]

No, those costs are not improvements. If anything, they are investment expenses which are not deductible. 

The property taxes could have been claimed in the year they were paid if you itemize deductions.