The Personal Property Lease Transaction Tax applies to businesses or individuals that either are a lessor or lessee of personal property used in Chicago. "Sales tax" is imposed on a retailer's receipts from sales of tangible personal property for use or consumption.Who must file Form ST-1? You must file Form ST-1, Sales and Use Tax and E911 Surcharge Return, if you are making retail sales, including leases or. Information on the Foreign Investment in Real Property Tax Act of 1980 (FIRPTA) and how it affects a foreign person with real property interest. Chicago has a different approach to these services and products and considers SaaS a lease of personal property. What if you lived in more than one state? You report it in both states. IL can tax a capital gain from the sale of property located in IL. CO can tax ALL your income, regardless of where earned. - Optional classification as a corporation subject to corporate income tax.