I have also created the same fields in the sales header, now when I create a sales order with the above customer, I want to flow the data of those 2 fields to the sales order. Can you guys please help me with this?
You need to add it to the validate Sell-To Customer No. code where it copies the customer address field.
You tagged this as “Dynamics NAV”, but the pictures you shared are from Business Central, so I expect that you use BC and AL for this?
If that is the case, then I would suggest that you subscribe to the “OnAfterCopySellToCustomerAddressFieldsFromCustomer” event (on the Sales Header table) and do it here.