Adding a new product

To add a new product to a backend order, click on Add line item(s):

 

then Add Manual Product:

 

You will be prompted with a dialog where you can enter name, SKU, price, quantity and tax class:

 

When you’re done, click Add, and your product will be added to the order:

 

Finally, click Calculate Taxes and Calculate Total to make sure the order is fully updated with this product.