You’re probably receiving this error message because in your QuickBooks Online account you already have a customer, supplier or an employee with this name. For example, there is a mismatch here as your client can’t be your vendor at the same time.
To fix this, please either:
- Change the name of the supplier in your Dext account. You can do that from the Item details page. Then you need to open the Suppliers tab and merge the initial supplier name with the one you need.
- Change the client (customer) name in QuickBooks Online.
If you have multiple supplier entries with similar names, it would be worth merging those before heading to QuickBooks Online.