Thanks for the response. Is it possible to go through it step by step? I'm reading what computed fields are and i'm lost. 

I've tried add Related Fields > Sales Order > Location added to the invoice. But when creating the invoice from the sales order, the Location field is empty.

Hi,
You can do it via a computed field using studio/from the front end. In invoice line, there is relation to sale order line (field: sale_line_ids) and from sale order line you can get sale order and then new field.

So using this relation, build a compute field logic to get the new value

Thanks