D365 Finance & Operations and Dynamics AX Forum

You do have to manually key in the RMA number field which you should get from your vendor. You can make it up if the vendor does not give you one or at least try to make it relevant by maybe calling it RMA#### with the ####'s being the original PO number. You can then use the "Copy from" button at the top of the form (under the Purchase order tab) to copy lines from an existing PO or you can manually key in lines. It's slightly less robust than the SO return process as you don't have the "Find" option to clearly link it back to the original order but you can use the Copy function to copy from a PO and the "invert sign" button since a PO line return must be for a negative quantity.

As far as processing the order, there is nothing in Warehouse management that could be used. I.e. you cannot create a load shipment and work for Purchase returns, you can only really process them directly in D365 using manual processes or traditional warehousing to pick and ship the return.