RECORDING OF PURCHASES

Renjith Ar (31 Points)

02 June 2020  
Im Running a Musical instruments shop and im purchasing some Materials for making certain instruments. (LOACL PURCHASES) But my Suppliers are not able to provide INVOICES for the purchases that I've made. The point is All my Raw materials are Nil Rated under GST. so How can I Account this for the purpose of showing them as my purchases because im issuing Invoices to all my clients by showing Nil Rate.
please Help. Thanks in advance