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I file 83(b) election, but did't include a copy of it in that year’s tax return
This may be relevant: it suggests that IRS is lenient with the attachment of the form with 1040. To paraphrase: "The ruling involved a taxpayer who timely filed the election with the IRS within 30 days of the property transfer but who did not attach a copy of the election to his or her Form 1040 for the year of the transfer.  Fortunately for the taxpayer in question, the ruling indicated that the submission of the election to the IRS within 30 days of the property transfer fulfilled the requirements for a valid election, and the failure to attach the copy to the tax return did not affect the validity of the election.  The IRS requested that the taxpayer forward a copy of the election to the IRS to be associated with the processing of the tax return. - See more at: http://www.bnncpa.com/services/employee_benefit_plans/blog/irs_rules_that_failure_to_attach_83b_election_to_form_1040_did_not_invalida#sthash.0c3h2nJY.dpuf" If someone wants to grok the IRS ruling: http://www.irs.gov/pub/irs-wd/1405008.pdf And this is the article where I saw the above referenced. www.bnncpa.com/services/employee_benefit_plans/blog/irs_rules_that_failure_to_attach_83b_election_to_form_1040_did_not_invalida