Agree with the other responses; you should have a one on one discussion with a tax professional.
Having said that, a key piece of information has not been provided; was the check the box election made at inception or was the multi-member LLC entity structure in place and in business and then you changed your entity type?
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
