If you have not yet filed your tax return or if your tax return has been rejected, you can remove the dependent by following the steps below.
If you have already filed your tax return and it has been accepted, you should wait until after your tax return has been processed and you have received your refund, then you can Amend your tax return to remove the dependent.
How to Amend:
How can a person change their dependent status? I would it take to update?
What are you trying to change/update? Have you already filed your return? Please provide details so we can better assist.