Sale of Home in LA Fires

So she has a $650K gain from an involuntary conversion, $550K of which was rolled over to her new home.  But where do you plug in the $250K exclusion (assuming this was her principal residence)?  Off the top of my head, I think I need another cup of coffee, and I would file an extension so I could give it more thought after April 15.  

But it's probably an easy question for an Intuit Employee Tax Expert, so stay tuned.  

In the good old days, we could change typos in the subject line so that firs would not eternally be read as fire(s).   Maybe if I called Intuit support and spent a few hours on the phone, they could tell me that it's not possible to make that change.  

Anyway, AI Slop says:  "When a home is involuntarily converted (e.g., destroyed by natural disaster), Section 121 applies to the gain first, and any remaining gain may be deferred under Section 1033."  I wouldn't trust that as far as I could groom a horse, but it might lead to some reliable references.