Some QB POS users have custom tax codes. Connex uses the default codes of Non and Tax. When the tax codes do not exist or the casing is different, orders will fail to sync.
What does a custom code look like?
Here is an example:
How do I map taxable and non-taxable codes?
In this example, we will add GOV for taxable line items and LBR for non-taxable items. Here are the steps: