Simply convert the property to personal use, and depreciation stops on that date of conversion.
Work through each and every asset listed in the Assets/Depreciation section and select YES for "I stopped using this property in 2019". When presented the "Special Handling Required?" screen, read the options there to understand why I am telling you to click YES. Then click YES. Finish working through the asset, keeping in mind you have to do this for every single asset listed. That will do it and stop depreciation.
Turbo Tax was recalculating depreciation to make up for the year with no depreciation.
Don't know why (programming error? Programming limitations?) but the program as designed is not capable of "correctly" handling depreciation when a property is switched back and forth between rental and personal use. Never has been. One can do a manual over ride. But when you over ride, you can't e-file. You have to print, sign and mail the return to the IRS.
One way around this is, (assuming it's going to be personal use for the entire calendar year) is to leave it classified as a rental. Then claim 1 day of rental use, 364 days of personal use, and .1% of business use. Claim no income and no expenses of course. Then, if any depreciation is taken for that one day of business use at less than 1%, it will be minimal (only a few bucks.)
This keeps things on track when, the next year you return the property to 100% business use.
