We use the Intuit API V2 to import Invoices from QuickBooks Desktop.
At one point we imported a few invoices that no longer show up in the list of "all invoices". But if we request the invoices "by id" (one at a time) we do get them. They still have an open balance > 0. Is there a reason why these invoices don't show up in the "all invoices" list? We did request all the pages.
Something that we noticed is that the problematic invoices all have Lines with SalesTaxCodeId 2 and seem to be "Tax returns".