RequestIncomplete
Example
{
	"code": "RequestIncomplete",
	"target": "Unknown",
	"details": [
		{
			"code": "RequestIncomplete",
			"number": 167,
			"message": "Request is incomplete",
			"description": "The request was canceled before completed or an unprintable character was included in the body",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/RequestIncomplete",
			"severity": "Error"
		}
	]
}
Explanation

This indicates that your API request contained unprintable characters or was incomplete. This can occur if the request contains unicode characters that cannot be represented correctly by AvaTax, or if the API call was interrupted.