No, you do not have to file a paper form. 

If your return rejected, you can go back into your return and indicate that your legal guardian claims you as a Dependent.

To do so, please follow these instructions:

• Sign In to TurboTax Online
• Click "Take Me to my Return"
• Click "My Info" from the left side of your screen
• Click "Edit" next to your name
• Answer "YES" to the question "Someone else can claim me as a Dependent" and "YES" to "and this person will claim me on their 2018 Tax Return".
• Next, click "File" from the left of your screen and walk through the process to refile your return

If this doesn't work for you, please comment below so that I can assist you further.