@J_E_S_S_E wrote:
SEIC-F1040-506-02 - Each 'QualifyingChildSSN' that has a value on Schedule EIC (Form 1040), must not be equal to another Qualifying Child SSN on another accepted return for the same tax year.
Do you know if someone may have claimed the child on another tax return? Your parents, partner or ex-partner, aunt, uncle, grandparent?
