"code": "MultiDocumentPartiallyLocked",
	"target": "Unknown",
	"details": [
			"code": "MultiDocumentPartiallyLocked",
			"number": 1312,
			"message": "This MultiDocument is locked and cannot be modified.",
			"description": "Parts of this MultiDocument have been filed on a tax return.  The MultiDocument object may no longer be modified.",
			"faultCode": "Client",
			"helpLink": "",
			"severity": "Error"

A MultiDocument transaction involves more than two companies. Most tax authorities recognize only transactions between two companies (a seller and a buyer). This means that a multi-company transaction must be reported as more than one transaction.

When any part of a MultiDocument transaction has been reported to a tax authority, the MultiDocument transaction can no longer be modified. This error message tells you that part of your MultiDocument transaction has been locked; you must now treat each separate seller/buyer transaction individually.