I just wanted to double check that we have until Midnight of May 17, 2021 to file the Form 4868 Extension correct?
Sounds about right, but I certainly would push the midnight hour before I hit the send button.
Intuit has been known to suddenly impose a 9 PM or similar cutoff on the deadline days so best not to wait til the last minute.
As the old saying goes, why put off until tomorrow what you can do today... So I would not wait until the last minute... just my opinion
paragraph 4 discusses extensions 😁