What is a Declaration Control Number?
A Declaration Control Number (DCN) is the identification number assigned to your e-file return, either by us or by the software you use. You can use this number to check the status of your e-file return. This number should be recorded on your California e-file Return Authorization for Individuals (form FTB 8453 or FTB 8453-OL), on your California e-file Signature Authorization for Individuals (form FTB 8879), or on your copy of the return.