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I have this same message. When i created an “I.D. ME” account for the IRS to verify my identity, i went through the process with submitting my drivers license then it told me it couldnt use the online verification to verify me. Now its asking if i received a letter in the mail from the IRS with a 14-digit control number?? In parentheses it states forms: 5071C, 5447C, 5747C or 6331C. Anyone else have this?