Let me save you some time...we have over 450 hours in trying to figure this out, and even bought a contract with Zebra, to no avail.

The answer is, unless your barcode is EAN13 or Code128 (which it isn't , or you wouldn't be asking the question),  you can't use the Quickbooks Warehouse Manager app.  This is because the QBWM app 'owns' the scanner, which means it doesn't use Zebra's Datawedge software to interpret the barcode, but instead, QBWM connects straight to the barcode scanner itself. 

There are no settings, no user ability to manipulate data before it gets into the QBWM.  So until the developers figure out that EAN13 and Code 128 only covers about 20% of the world's barcodes, we will have to use some kind of outside software service to accomplish what Intuit advertises that they can do natively.