ReturnNameNotFound
Example
{
	"code": "ReturnNameNotFound",
	"target": "Unknown",
	"details": [
		{
			"code": "ReturnNameNotFound",
			"number": 122,
			"message": "The form named '-0-' cannot be found.",
			"description": "Please use the ListTaxAuthorityForms API to identify the list of relevant forms.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/ReturnNameNotFound",
			"severity": "Error"
		}
	]
}
Explanation

This error occurs if you attempt to create a filing calendar for a tax return whose name is not recognized. For a full list of recognized forms, please use the GET /api/v2/definitions/taxforms endpoint.