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Declaration control number (DCN). The DCN is a 14-digit number assigned to each tax return. It should be included in your acknowledgement message. Clearly print or type the DCN in the top left corner of each Form 8453 after the IRS has acknowledged receipt of the electronic tax return.
How do I get in contact with the IRS?
Contact an IRS customer service representative to correct any agency errors by calling 800-829-1040 (see telephone assistance for hours of operation).
What is a name control?
A name control is a sequence of characters derived from a taxpayer's name that is used by IRS in processing the tax return filed by the taxpayer.
