Relative has a second home that has historically had 14+ days of personal use (lived in during summer, rented out to unrelated parties the rest of the year).
Over time, the property has built up quite a bit of "deferred" losses due to the vacation home loss limitation rule.
With advancing age, the relative will no longer be living in the house during the summer and the personal use days will drop to zero.
So what happens next? I assume that since the vacation home loss limit is no longer in place the property will now be allowed to generate a loss based on current-year income and current-year expenses.
But what about the pent-up loss? Can any of it come on to the current return? Or can it only be used to reduce a current-year profit down to zero but not to create or increase a current-year loss?