See this TurboTax support FAQ for the sale of a rental - https://ttlc.intuit.com/turbotax-support/en-us/help-article/real-property/sold-rental-property-repor...
You have to carefully follow the screens to report the sale.
On the screen Review Your Rental Summary click Start on Sale of Property/Depreciation
Follow the screens and on the screen Describe this Asset select Rental Real Estate Property
On the following screens you will be asked to enter the Cost and the Cost of Land. Continue with this section until it completes.
