Sale of Rental Property

My husband and I have a rental beach property that we are entertaining selling.  We have had it for 15 years as rental property the entire time.  We have accummulated a large sum of money in our Passive Activity Loss bucket.   When I tried to do a what if using our 2019 taxes it did not bring in any of our passive losses from prior years to offset the net gain.  What can I do to get an estimate of how this transaction would have affected us in 2019???????   THANKS FOR ANY HELP