1040-US ELF: Error Code R0000-507-01

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Error Code R0000-507-01: Valid for 1040/A - 'DependentSSN' on Line 6c(2) of the return was used as a Dependent SSN in a previously filed tax return for the same tax period.

The dependent's SSN claimed on the tax return and/or Schedule EIC has been used on another tax return. This could be the result of an inadvertent data entry error or someone else has claimed this dependent.

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