I am learning the hard way, Single Member LLC is treated as a separate entity based on state you live. It would be ideal if state filing had the prompts to walk you through and fill the requisite forms for state based on how state rules apply for the LLC. I am being asked for income details 10 years ago from my state as I had filed my returns as single member LLC and reported SCHED C. Now state is coming back to request details and submit data on tax years as long ago as 2008.
