990-US ELF: Error code R0000-933-01

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Error code R0000-933-01: If "Amended Return" or (Superseded for 1120/1120S/1120-F/1041) checkbox is not checked, then taxpayer TIN in the Return Header must not be the same as a TIN of a previously accepted paper return for the return type and tax period indicated in the tax return.

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