Most of them are new entities in 2020 with the 2553 filed within 2.5 months of formation. Formation in October 2020 with 2553 filed in November 2020.

Here is a similar question for you: Taxpayer was operating as a sole proprietor for January and February. They want to do an S Election. Unfortunately, because they were not an LLC, 1065 or Corp the S Corp can only start with the date they incorporated (treated as new entity). Whereas, a disregarded LLC can elect back to the 1st of the current year if filed by March 15th. You agree?

I really appreciate you taking the time to respond to my initial question.