Keep the state notice and last year's business return where you can reach them, because every one of the twenty minutes should land on your entity rather than on searching for paperwork. Whichever state wrote to you, that letter tells us which report is in play and how far back it reaches, while the return shows who has been watching the federal side during all the time the state side went unwatched. Twenty minutes is long enough to hear which reports the entity owes, which years are sitting open, and whether your standing in that state is at risk. Should the slots fail to appear here, the link underneath loads the same scheduler in a tab of its own, and the phone number reaches somebody who can write you in by hand.