You must complete the transfer definition by specifying a transfer reason and then save the transfer before you can submit the transfer for approval.
From the Add Inventory Transfer window:
Select a transfer reason.
transfer reason
Select a reason from the drop-down menu. Reasons are defined via Applications > POS Back Office > Setup > Transfer Reasons
Note
The transfer reason is already specified if you chose to add the inventory request to an existing transfer.
Click Save. This closes the window and sets the transfer status to open.