What apps are out there - would love an app that you enter the PO and QTY's client ordered and a column that has Qty, shipped qty, and it calculates the bal owed (backordered), - each shipment is a new SR(shipping Receipt) that aggregates until the PO is done - this would allow for packing slips to show what shipped that day and what is owed/backordered - app has button bill now and another button aggregate ... it then handshakes with QBO to either generate an INVOICE for what has shipped or waits to aggregate and signals when ORDER COMPLETE whereby a click "generate invoice" handshakes with QBO and autofills the Invoice we can email and print for the client - the app will be the placeholder for all SR(shipping receipts) in case you have to go back and find days that you shipped XYZ and qty etc...... this app I think would help many of us... Or QBO should create a shipping tab that does this - the shipping tab would be where packing slips would be generated off of a shipping receipt 

I too have the same issue, we ship partials as they come in on very large orders.  Due to supply chain issues product needs to get to our customers as soon as they come in and not everything comes in at the same time.  

Customer PO is for 

15,000 Widget A

 5,000 Widget B

22,000 Widget C.   and so on

In stock is only 5,000 widget A and 12,000 Widget C must ship right away so Ship Day 1

5,000 Widget A 

0,000 Widget B

12,000 Widget C

Fishbowl lets me do this and print perfect packing slips of what is shipping and it keeps the PO open, I can invoice what has been shipped and then when more come in I can pick, print packing slip, ship and bill for what is shipping - - over and over till PO is filled unfortunately for our wholesale division which is not on Fishbowl I can not do this and its killing me.  I have to edit the packing slip in a pdf editor and change the qty's and keep track on a spreadsheet until the order is done - we have many orders so this is HELL....