Which value of house to enter in Form 8829?

I bought my house on 05/01/2014 for 258K. Currently I am amending tax return for 2018

 

I am looking at Part III of Form 8829. At the time when I was doing my taxes for 2018, I entered tax value of home and land for line 37-38-39 but I coped them wrongly.

 

So for 2018 tax return, where should I get these values from? Maybe appraised property values by the local government? Or should I put in the value I paid back in 2014? If so then what would be the land value?