Hello,
The serials are in a specific table and HikaSerial includes its own export system for serials (via the backend).
Serial listing in the backend does have a filter where you can look for an order number or an order id ; and then export the displayed serials in a CSV, XLS...
In order to have an integration with quickbooks, it would requires some modification in order to includes the HikaSerial serial table into the export.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.