CannotModifySstNexus
Example
{
	"code": "CannotModifySstNexus",
	"target": "Unknown",
	"details": [
		{
			"code": "CannotModifySstNexus",
			"number": 1503,
			"message": "The nexus cannot be modified.",
			"description": "This region is managed by the Avalara's SST program. If you need to update this nexus, contact Avalara Support.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/CannotModifySstNexus",
			"severity": "Error"
		}
	]
}
Explanation

SST nexuses cannot be modified by users. Regions managed by Avalara’s SST program must be updated through Avalara Support. Our support team is reachable through a number of means, so visit our support page to get connected update your nexus.