Illinois Non-Hotel Form is a document used by the Illinois Department of Revenue to report and pay taxes on lodging that is not part of a hotel. This form is used to report and pay taxes on short-term rental properties, such as vacation rentals, Airbnb, room rentals, dormitories, and other dwellings, for stays of 30 days or less. There are two types of Illinois Non-Hotel Form: Form ST-1 and ST-1Â N. Form ST-1 is used to report and pay taxes on rental properties when the lessor, or the person renting the property, is a non-resident of Illinois. Form ST-1Â N is used to report and pay taxes on rental properties when the lessor is a resident of Illinois. Both forms require the lessee to report the rental income and calculate the appropriate taxes.