EntityLimitExceeded
Example
{
	"code": "EntityLimitExceeded",
	"target": "Unknown",
	"details": [
		{
			"code": "EntityLimitExceeded",
			"number": 10,
			"message": "The request contained too many entities.",
			"description": "The request contained -0- entities, which exceeds the -1- entity limit.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/EntityLimitExceeded",
			"severity": "Error"
		}
	]
}
Explanation

Only a defined number of entities is allowed for this type of request. The error description will tell you the entity limit for your type of request. Check your request for the amount of entityUseCode fields and ensure the total does not exceed the limit.