Taxpayer TIN in the Return Header must not be the same as a TIN of a previously accepted electronic return for the return type and tax period indicated in the tax return. WHAT DOES THIS MEAN???

    It means that someone has already submitted a tax return with an ITIN or SSN which is the same as the one you attempted to submit

    1) Doublecheck all your SSNs
    2)  Did you file a tax return this year can't submit again if it was accepted.   You could resubmit if it was Rejected.
    3)  First submission and no other mistakes??  You got and Ex boy/girfrend/exspouse/currentspouse/childre/parents etc that might have used one of the sme SSN's ontheir tax return?  That cpould be the problem.?

    4) None of those?  Time to check your credit reporting agencies for ID theft.
    Ina all of the cases #2 thru 4 you would have to print and file on paper..sorry...the computers are unlikely to get tht numbe removed in time for you to efile this year.

    For error #1, you should be able to re-file after correcting the numbers
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