Total Basis is usually your original cost, plus cost of improvements.
Basis Adjustments include depreciation (such as from a Home Office), improvements, and more.
<a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-pdf/p551.pdf#page=5">https://www.irs.gov/pub/irs-pdf/p551.pdf#page=5</a>
What did you enter for land for the original rental property? Your property tax statements may have an allocation of building versus land.
I *THINK* it asks for both the original purchase date AND the "placed in service" date. If it does not ask for both (keep going a few screens), then you would need to go back and enter the "placed in service date" (January 2018) where it asks for the date purchased.
