If you are running online stores in different countries, and each country has its own warehouse, you may set a default warehouse for each online store now. Eventually, such will be selected on the created document (sales order, invoice, etc.)
1. in additional settings of the online store, indicate the selected warehouse in the respective field
2. In the case of running more online stores, assigning a selected warehouse to each one of them is needed.
When warehouses for the online store are configured, in Additional settings - Order Management, tick off the ''Invoice creation - use warehouse from order'' option
The following documents are supported: sales orders, invoices (all formats), and packing lists. Offers are not supported.