Business Property Statement (571-L Forms). You need to provide a depreciation schedule or complete list of all property used in your business.Form CT-1, Supplement to Corporation Tax. Instructions. See Form CT-1 for the following topics: • Business information (how to enter and update). Use Form ST121, Exempt Use Certificate, to purchase, rent, or lease certain tangible personal property or services exempt from sales tax. Filing Requirement – This declaration must be filed with the Assessor of the town where the personal property is located. You will have to file at least the general rendition form. The building and business personal property form excludes coverage for which of the following?