Either you create new customer and then click on Save and open. Otherwise click on new Sales Order and select customer.
Select Customer selection for Sale order.
Select customer and save.
As we create very simple sale order so we select only one Item D0001 and set quantity 10 and also select change warehouse to 11.
Save the sale order
When the sales order is saved. The go to Sales Order tab => Generate=> Confirm Sales Order is enable. Click on it
Click on Ok.
You can find that status of Sales order is Open.