You can remove Jacob from your TurboTax data by following these steps in TurboTax:
No one has access to your return, you have to make the changes. If you have not filed your return, you can go back and remove Jacob. If your return has been filed & accepted, you would need to amend your return.
No one can do anything to your your tax return for you. No one else has access to your return. If you have NOT e-filed and you need to remove a dependent, then go to My Info to delete the dependent yourself.
If you already e-filed you will have to amend the return after it has been fully processed if you need to remove a dependent.