QBDL error Invoices: There was an error when saving an invoice. QB error message: The transaction sales tax field cannot be left blank, even for non-taxable customers and sales which have no taxable items
This is most likely being caused by the Sales Tax feature in QuickBooks being enabled, causing QB to search for a Sales Tax field in the invoices being synced over. Kennel Connection and QB handle taxes differently, with KC taxing individual line items separately instead of just taxing the entire invoice like QB.
The QB Sales Tax option needs to be disabled so it doesn't search for this information. KC includes any taxes as a line item during the sync.
Depending on the version of QB, this setting can usually be found under Preferences in the Sales Tax section. If it is On, switch it to Off and sync again for the same time frame to see if any rejected invoices sync.
If you are not able to find this setting, contact Intuit for assistance.