The Illinois Class 6b Renewal application is a process used for real estate tax abatement. It is a program offered by the State of Illinois that allows qualified businesses to receive a partial or full real estate tax abatement. Qualified businesses must be engaged in manufacturing, assembling, processing, refining, warehousing, research and development, or technology services. There are four types of Illinois Class 6b Renewal applications: 1. Expansion Application: This application is used when a business is expanding or making improvements to their existing facility. 2. Renewal Application: This application is used when a business is renewing their existing Class 6b tax abatement. 3. Relocation Application: This application is used when a business is relocating their facility and is seeking a new Class 6b tax abatement. 4. Abandonment Application: This application is used when a business is abandoning their existing facility and is requesting a cancellation of their existing Class 6b tax abatement.