Hello, i need help how to properly import.  Our client have Imonggo POS that cant sync with QBO. 

We already exported the 10,000 items from the POS then imported it in the Product and Services Template where there is a Quantity Column.

When we tried to Import Bills, we realized there's no way to connect it to the Products per Bill Number. There's only Account Name Column there and Total Amount. 

Now that there's additional 5,000 items in the POS. How are we going to Import it now to QBO? Are we still going to use the Product and Services Template? Wont it override what we previously encoded?

And how are we going to Import both Bills and Inventory in a synchronized way without the hassle? 

We had already imported Sales but the Import Template only recognizes name, not the Barcode Number. So we cant just override the Quantity by uploading all 15,000 products right? 

Please help. Thank you