Since you are amending to include your spouse, make sure you have entered your spouse's Social Security number or Individual Tax Identification number correctly. You may also need to review the prior year AGI number to ensure it matches. You can also try entering zero if you filed separately in 2023.
If these do not assist, you may need to mail your amended return in.
Can I e-file my federal Form 1040-X amended return?
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"