If you have filed your return you will need to wait until your return has been either accepted or rejected. Once you know the status of your return, you can follow the set of instructions below to address your issue.
If you
filed your return and it was rejected: To change the issue so that your return will be accepted, you will
need to go in to correct your rejected return. Then, you will go back into
your return (following the fix a rejected return instructions) and find your
name in the Personal Info section. Click to edit beside your name. On the
following screen near the bottom, you will find the area to click that you can
be claimed as a dependent by someone else. I will attach a screenshot of that
area, so you are better able to locate it.
To correct a rejected return, please see the following
TurboTax FAQ:
https://ttlc.intuit.com/replies/3302275
If you have already
filed your
return, and it was accepted: You will need to
amend your return, once it has been accepted and any refund due has been paid
out. Then, you will go back into your return (following the amend
instructions) and find your name in the Personal Info section. Click to edit
beside your name. On the following screen near the bottom, you will find the
area to click that you can be claimed as a dependent by someone else. I will
attach a screenshot of that area, so you are better able to locate it.
