Add multiple Billing Addresses under one GST number

Add multiple Billing Addresses under one GST number

My client owns multiple businesses in various locations but they all come under one GST.

Is there a way to add multiple billing addresses for the same GST?

Managing this by adding multiple Shipping addresses is not an option. The client wants the GST to remain the same but the billing address to change according to the location so that the bills can be processed at the respective locations.