BobKamman
Level 15

From the Internal Revenue Manual:

Married Filing Joint or Married Filing Separate is Invalid or Filed with Incorrect Status
  1. The married filing joint election is potentially invalid if the individuals were not legally married, did not consent to the joint return, or if the return contains a forged signature.

  2. Allow claims if the marriage was not legal for federal tax purposes (even if the claim is received after the due date) if the following is present:

    • Verification, such as court documents showing the marriage was not valid for the tax period involved: copy of divorce decree or separate maintenance; documents verifying that the taxpayers did not live together during the last six months of the tax year, such as a lease agreement, utility bills, etc.; or an affidavit, signed and sworn under penalty of perjury, stating the marriage does not exist.

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