Where is my stimulus check? I did not file the 2018 tax return and my 2019 tax return is still being processed.

When I logged in my Turbotax account, it said

"Looking for your stimulus payment?
It looks like you've already e-filed your 2019 tax return. The IRS has the info they need to qualify you for a stimulus payment. Note that you can't update your payment info here—the IRS will either send payment to your bank account or mail you a check." What does it mean?