Yes, your ex-spouse's accountant is correct.
You need to Amend your 2024 Federal and State Tax Returns to remove your son AND Amend your 2023 Federal and State Tax Returns to add your son as a Dependent.
In order to avoid any interest or penalties for your 2024 tax returns, you should file and pay the balance due with your Amendment by 4/15/25. (This is because you received more than the refund you were due). Generally you have up to 3 years after you filed the original return to file an amendment. Please see What is the deadline for filing an Amended Return? for more details.
Please see these TurboTax Help Articles for instructions on how to Amend each year:
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
