How I can file 2040 if my parents already claim as a dependents

UPDATED FOR TAX YEAR 2019

If your parents have claimed you as a dependent, you must still file a return if:

• Your unearned income (interest, dividends, etc.) is over $1,100;
• Your earned income (from a job) is over $12,200 or more;
• Your income was from self-employment [issued a 1099-MISC and not a W-2] and is $400 or more; or
• You want to get back any taxes withheld.

You can include that you are claimed as a dependent in the Personal Info section of TurboTax:

1. Click on the Personal Info tab.
2. Click on Edit next to your name. 
   
3. On the screen,Your personal info, in #3 click on the Yes radio button under:

• Someone else can claim me as a dependent on their tax return; and
• And this person will claim me on their 2019 tax return. 

[Edited | 4/14/2020 |  8:03am PDT]