At first, go to config.php file and then set the value for $qbocompanyid, $shopifyapkey, $shopifyshopname and $shopifyproductid
Authorize with quickbooks to find
using the link below and then submit the form below using proper information.
Click here for Authorization
Now set up a cron job from your cpanel for every 30 minutes to this link https://gesoco.com/shopifyqbo/cron.php