Investors & landlords

want to know how they arrived at their calculation or how I can correct it!

You need to work through the asset again, because there's no way I can see that you entered the correct information or made the correct selections, based on the number you're getting from TurboTax.

You also still have not conformed that you are using the CD version of TurboTax 2018. I am only assuming, since you stated the property's in service date is 9/20/2018.

Work through the asset until you get to the summary screen. Then click the "show details" checkbox. What you see should like similar to the below. Note that since I do not know your "real" cost basis in the property, I assumed a cost basis of $400,000. Then giving the land a value of $51,787 makes the difference exactly $348,213 - the cost basis of the structure to be depreciated.