Reject code SEIC-F1040-535-04 indicates that a dependent's Social Security Number (SSN) and year of birth on Schedule EIC do not match IRS records, often meaning the child is too old for the Earned Income Credit or information was entered incorrectly. To fix, verify the dependent's info with their SSN card/birth certificate, correct any typos, and resubmit.
Click on My Info on the left side of the online program screen and review your entry for the dependent.