Hurricane Ida 5500 relief

Thankfully, none of my clients ever seem to be in a disaster area where they need disaster relief, but this time, one of my audited plans is in NYC and wants to take advantage of the 1/3/22 deadline.  From what I'm reading, there's nothing special to do - just file before the new deadline, and the IRS is supposed to know by the address that the plan sponsor is eligible for the relief.  For those who unfortunately have to deal with this on a more regular basis, does that sound right?  Doesn't the box on Line D usually have to be completed?  I don't want to add a $2,000 late filing penalty to this company's other issues...

I have a few clients in New York that will be taking advantage of the extended deadline, too.  It is my understanding, per the IRS announcement, that you would still need to provide the relief information in Line D of the Form 5500 (although it does not specifically refer to how to report it on the Form 5500), something like this:

Hope that helps!