Why not mail a letter or make a phone call correcting the info? If this is number error and there is no fraud, why would you have to "file a 1040x amendment"? Why not respond in writing, with a photocopy of the child's social security card?
Certified Tax Specialist -- State Bar of California Board of Legal Specialization (J.D.; LL.M.-Tax)
Electrical(M.S.E.E.)-Chemical(M.S.Ch.E)(B.S. Chemistry)-Mechanical Patent (Intellectual Property) Attorney & MBA (562) 594-9784 --- http://patentax.com
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Curt Harrington Patent & Tax Law Attorney Certified Tax Specialist by the California Board of Legal Specialization PATENTAX.COM This communication is general information and not legal advice, and does not create an attorney-client relationship. This communication should not be relied upon as any type of legal advice. Please note that no attorney-client relationship exists between the sender and the recipient of this message in the absence of either (1) a signed fee contract and (2) remission of an agreed-upon retainer. Absent such an agreement and retainer, I am not engaged by you as an attorney, nor is any other member of my law firm.