I have done this only once, and it was successful.

We filed the original 1120S with the 2553, claiming late filing exception, "Rev. Proc. 2013-30." The LLC started paying its owners as employees from Day 1, even though they had not filed the 2553 yet.

Therefore, the first tax return had to be an 1120S and not a 1065 since partners cannot have wages.

It worked.

Attachment and F2553: "Always intended to file as an S corp but checked the wrong box. Always paid wages. This was the Initial Year of the company."

Also filed 3/2/2018, not extended.