All Prior Depreciations show as zero..

Hi all,

 

I recently 1031-exchanged a condo I owned for 20 years.  I have been renting it since 2009.  

 

I am trying to figure out the total depreciation I have claimed over the years, but the 2019 Form 4562 report shows prior depreciation as zero.  I went back and looked at my taxes a few years back and all of them show the prior depreciation as zero.

 

Is there a scenario where my depreciation was not allowed?  or something else could be wrong?

 

I have been using TurboTax online all along.

 

Thanks in advance!