Whichever state has written to you, the same three questions come first: which report it is asking for, which entity it belongs to, and how far back it reaches. Twenty minutes gets that notice read next to last year's return, so you hear which reports your entity actually owes, which of them slipped past unfiled, and whether good standing is at risk anywhere you are registered. You also hear the part your preparer never raised, which is how your state arrives at the amount and what planning would have done about it while the year was still running. Nothing about waivers or penalties gets promised on a first call. Keep the letter within reach, the return if you can lay hands on it, and your formation paperwork if it exists somewhere findable.