Joanne Nope, no sooner than 45 days before your exention of stay expires. If your extension expires while you're outside Thailand you'll have to start fresh again when you come back (or get a new Non-O in the US).
No, 90 day reports are for people with visas longer than 90 days AND who remain inside the country longer than 90 days. If you leave the country and come back in, 90 days starts from the time you've reentred.
Bruce Frausto If before your first covid extension you were on a tourist visa or visa exempt entry, you can apply for another covid extension until March 25th.
If you were on a non-immigrant visa, you cannot apply for a other covid extension.
In either case, you can submit and application and be denied, you'll get 7 additional days to leave thr country.