Is anybody using this connector?

We are having a problem getting TaxCodes to match up in AvaTax. It appears that the connector is passing the TaxClassID from the Product table instead of the TaxCode that would synch up with AvaTax.

If you are using the connector, could you let us know how you set it up to pass TaxCodes properly? The developer is telling us that it will cost $350-$390 to modify the connector to make it pass the TaxCode rather than the TaxClassID.

Any ideas would be greatly appreciated.