RemoteValidationError
Example
{
	"code": "RemoteValidationError",
	"target": "Unknown",
	"details": [
		{
			"code": "RemoteValidationError",
			"number": 1502,
			"message": "The operation failed.",
			"description": "The operation failed with an error: -0-.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/RemoteValidationError",
			"severity": "Error"
		}
	]
}
Explanation

This indicates that the AvaTax API encountered an internal error and could not continue. The Avalara API team has been notified of this error and will address it. No action is necessary.