It matters if that is Condo or Coop (as an association?). Also, they likely don't own a Trust (strange concept); there would be some wording that the property owners are by definition the Trustees. You should find there are operations: dues and assessments and reserves and outlay. No one just collects dues and nothing else happens. Someone should have the financial reporting for you. This is the entity that exists for the common need of how the property is financially managed, maintained, repaired, etc. It might cover grounds expense, snow removal, sewer, cable, taxes, etc. Do you have a previous year return for reference? If not, you can get info from the IRS for their EIN, or get a look at the initial letter issuing the EIN, because they might have elected to be under NFP (990) or 1120 or 1120-H.

Yes, they file a return every year.