I've looked at the PDF of my own tax return and can't find any calculation form or worksheet that indicates I converted a rental to personal use. I do know for a fact that I myself converted one of my rentals to personal use in 2018. But I can't find anything in the PDF that shows that.
I am assuming the property was placed in service before 2018.
Pull out the SCH E for both 2018 and 2019.
On that form you'll note that if you have more than one rental property, each property is assigned it's own column (A thru C) with the property for a specific column identified in PART I. (If you only have one rental property, then only column A is used.)
Look at line 18 amount under the column that is for your rental property. If those amounts are the same for 2018 and 2019, then you did not convert the property to personal use. (A few bucks difference between years is expected, and is not an indicator you converted.)
If the difference between those amounts is significant, with the 2019 depreciation amount being significantly lower, then most likely you converted the property to personal use in 2019.
You'd still need to confirm this by opening the .tax2019 file in TurboTax 2019 so you can edit that property to see if you checked the box for "I converted this property to personal use".
You need to confirm this, because if you converted it to personal use on Dec 31 of 2019, then the depreciation amounts for 2018 and 2019 could be so close that you would mistakenly think you didn't covert it.
