There are multiple registrations listed under the GST laws. Voluntary registration isn't legally binding and based on the will of business owners. Compulsory registration is imposed irrespective of the annual turnover, for e-commerce companies/sellers and organisations have inter-state sales of goods. Composition Scheme Registration is mandatory for businesses having different yearly turnover amounts. The tax slab is INR 20 lakhs (or INR 10 lakhs for businesses running in specific states) to INR 40 lakhs, INR 20 lakhs to 50 lakhs, INR 20 lakhs to 1.5 crores (or INR 75 lakhs for businesses of special nature). In special cases, some businesses are exempted from GST registration. It includes direct crop supply from cultivated land by agriculturists, goods or services that do not fall under the GST taxation, businesses that fall under voluntary registrations, and organisations that have an yearly turnover of less than INR 20 lakhs (or INR 10 lakhs under special provisions).