If you have already filed your return, print or view your return (available on your Tax Homepage). The first page of Form 1040 at the very top next to Your Standard Deduction will be a series of checkboxes and one will say "Someone can claim you as a dependent"
If you haven't filed you can check your My Info page -
- Log into your account. Click Take Me to My Return
- Click your My Info Tab
- This should bring you to a My Info Summary Page. Click the Edit button next to where your name, SSN, DOB all show
- This should bring you to the main Your Personal Info entry screen
- Scroll down to #3 (see screenshot below).