If you really did sell four rental properties that you did not depreciate, then you can't use TurboTax at all. You're required by law to depreciate any business property utilized for the production of income. That includes rental property real estate. Having sold the properties and never having depreciated them is a big problem. TurboTax isn't designed or intended to handle existing problems like this. So you need to forget TurboTax and seek professional help. This is especially true if your state also taxes personal income, as your issues for not having depreciated the properties are most likely, going to be quite a bit more complex.
