If you filed a return and claimed yourself as a dependent, that's all you have to do.

Thank you for your response. So, that means I'm ineligible for the stimulus check right? 

If I amended my taxes to claim myself as an independent because I wrongly filed as a dependent initially, when will I expect to get the stimulus check? Would it be after the 16 weeks it takes to get the return in the system?

If you wanted the payment this year, you would need to amend your 2019 tax return. 

The stimulus payment is an advance on a tax credit for the 2020 tax year. If you are a dependent in 2019, but not in 2020, you will not receive a stimulus payment this year, but will receive one when you file your taxes next year. 

If you amend your 2019 tax return, you would not get the payment until after the return has processed. The IRS is not currently processing mail-in returns and amended returns are mail-in. Generally, a mail-in amended return takes 6 weeks to process, but at this point, it is impossible to tell how long it would take. 

@Lbrev99