The customer receives a quotation from the supplier, and based on the quotation, the customer raises a purchase order. It's important to note that the quotation document is not mandatory for the HSN code or tax details. Vendors consider the HSN code and tax details at the invoice level. Even if we can't suggest dummy HSN code, when we file monthly returns or assess taxes, proper HSN codes are required.

In the case of multiple locations, the invoice will be matched with the appropriate location based on the vendor's invoice. However, the system cannot currently handle this level of flexibility.