Here is a simplified breakdown of the reject codes and how to fix them.

F8962-070: Marketplace insurance issue. Add Form 8962 or explain why you don’t need it. IND-031-04: Incorrect AGI or PIN. Check for accuracy and resubmit, or file by paper if needed. IND-452 & IND-515-01: SSN already used. Verify the SSN, check if another return was filed, or file by paper. F1040-164-01: EITC denied in a prior year. Complete Form 8862 and resend. R0000-905-01: Incorrect EFIN. Verify the EFIN and update it if needed. FW2-502 & F1099R-502-02: EIN mismatch. Double-check the EIN and company name or get corrected documents. R0000-500-01 & R0000-503-02: Name and SSN mismatch. Verify and correct the name and SSN, or file by paper. R0000-504-02: Dependent SSN mismatch. Verify and correct the dependent’s info. IND-517-01: Dependent claimed on two returns. File by paper with supporting documents. R0000-507-01: Dependent’s SSN used twice. Verify and correct or file by paper with documents. IND-116-01: Child Tax Credit issue. Verify the dependent’s birthdate and correct it if needed. F1040X-001: Issues with amended return. File by paper