RefundPercentageForTaxOnly
Example
{
	"code": "RefundPercentageForTaxOnly",
	"target": "Unknown",
	"details": [
		{
			"code": "RefundPercentageForTaxOnly",
			"number": 706,
			"message": "If refund type is TaxOnly, refund percentage should be null",
			"description": "If refund type is TaxOnly, refund percentage should be null.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/RefundPercentageForTaxOnly",
			"severity": "Error"
		}
	]
}
Explanation

This indicates that you attempted to create a TaxOnly refund for a partial percentage. The TaxOnly refund type is intended for use when a customer has provided you a tax exemption certificate after a sale was made. Accordingly, a TaxOnly refund cannot specify a partial tax amount; it can only refund all tax.