1040-US ELF: Error Code IND-510

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Error Code IND-510: The Spouse SSN in the return must not be the same as Primary SSN in another return filed for the same tax year.

The spouse's SSN has already been used as the primary SSN on another tax return. Verify on Screen 1040, located under the General folder, that the spouse's SSN is correct. If the SSN is incorrect, correct it and then recreate and resubmit the electronic file. If the SSN is indeed correct, the return will need to be filed on paper.  Refer to 1040 - US ELF:  Form 8948 - Paper Filing Exceptions.

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