Our free online guide for business owners covers Illinois sales tax registration, collecting, filing, due dates, nexus obligations, and more. A resale certificate gives you the right to purchase goods tax-free on the condition that you later resell them.Let's discuss what ecommerce businesses must know about sales tax in Illinois, including permits, IL tax rate, and more. To fill out this form, first gather your purchase records and personal details. Next, ensure you understand the tax obligations outlined in the regulations. To find out if your corporation may qualify for a tax break, obtain and read the. Internal Revenue Services' (IRS) Publication 557 — Tax-Exempt Status for Your. What is a resale certificate and who can use one? Many of our users apply this registration for their Software as a Service (SaaS) businesses as part of the Chicago Lease Tax. A manufacturer can fill out Form ST-587 and give to the seller in order to make the purchase of tangible personal property without sales tax.