"code": "StringLengthError",
	"target": "Unknown",
	"details": [
			"code": "StringLengthError",
			"number": 13,
			"message": "Field '-0-' has an invalid length.",
			"description": "Field '-0-' must be between -1- and -2- characters in length.",
			"faultCode": "Client",
			"helpLink": "",
			"severity": "Error"

AvaTax reserves storage space for strings of a specific length only. If you attempt to upload a string that is too long for the storage system, you will get this error.

Take note of the maximum and minimum lengths of the string, and try your API call again after adjusting the string’s length.