On the Sales Lines tab, a sales line can be removed as long as the sales line has not been transferred, i.e., has not acquired the Transferred status.
This could for example be used when a delay is caused by your company and hence you want to compensate the customer by removing the cost for some material. Another example could be, when the invoice is based on the resources used, but the material is free of charge. In this situation, it should be possible to remove the material from the selection in the generated sales line in order to transfer to the customer order for invoicing.
If you want to invoice a sales line at a later time, you should exclude the sales line from the transfer, by changing the status from Invoiceable to Not invoiceable, instead of removing the sales line.
A sales line cannot be deleted if it is generated from cost lines.
As a result of this activity, a sales line is removed from the selection of invoiceable and not invoiceable sales lines.