You can create Kerala Flood CESS Invoice by following below mentioned steps:
1. Firstly, you need to create a New Tax Account as CESS@ Kerala Flood and in percentage, type: 1%. Make sure tax account name is exactly this: CESS@ Kerala Flood
2. Create a new Tax Group including (CGST@9%, SGST@9% and CESS@ Kerala Flood).
Also, the same will reflect to you when you view your Invoice.
4. This will also reflect in GST Report and you can check the same in GSTR-1.