Don't delete a property just because you don't want to track the real-world rental property anymore. You'll lose all that historical data. Instead, you can choose to hide that property. Quicken hides the name of the rental property in the Property List, the Profit/Loss view in Rental Property tab, the Mileage Tracker, and the Tax Schedule and Schedule E reports. However, Quicken retains all historical rental property transactions along with their original rental property tags.