How do I retire points for a mortgage on a rental property I paid off?

You did not sell the house, you simply paid it off. The points should have been tied to the mortgage for the same length of time. Unless you paid it off early. In which case, follow below, dispose of the points.

When you are going through the assets and depreciation screens, you will need to mark each item, points in your case, as disposed of with the sale/disposal date of the payoff.

[Edited 01/28/20 | 7:36pm PST]

I did that.  And then it asks what date I retired the asset.  I entered that date.  Turbo Tax is then asks if special handling is required.  In my case the answer is no.  Next screen asks for sales price and sales expenses.  Both $0.   Turbo Tax the says that I have a loss instead of taking all of the remaining dollars as depreciation.

Sorry! You did not sell the house so putting in the zero's made the program think you sold the house at a loss. Leave it blank and just continue through the program.