MaxStringLengthError
Example
{
	"code": "MaxStringLengthError",
	"target": "Unknown",
	"details": [
		{
			"code": "MaxStringLengthError",
			"number": 14,
			"message": "Field '-0-' has an invalid length.",
			"description": "Field '-0-' must be no more than -1- characters in length.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/MaxStringLengthError",
			"severity": "Error"
		}
	]
}
Explanation

This indicates that the string you provided was way too long for the field. Check the data you provided against the developer documentation. Some fields can only accommodate strings of a specified maximum length.