Is land value the same thing as the taxable value or the state equalized value? I don’t have anything pertaining solely to land value on my tax bill.

State Equalized Value or Taxable value  ( for example in MI ) is just the taxable   value as opposed to  assessed value. This includes  bot land and improvement.  If you are renting out the property then you would need the aquisition  value ,  Cost of improvements and land value for  computing depreciation  computation.  Get the land value from  your city or from a realtor -- at the time of acquisition.