OK... ATTENTION ... you did NOT file a NON filer 2020 return (since there is no such thing this year) on the IRS site just now ... what you DID do is put info into the NON filers PORTAL in order to get the ADVANCE CTC payments being sent out shortly. https://www.irs.gov/credits-deductions/advance-child-tax-credit-payments-in-2021
To get ANY of the stimulus payments you MUST file a 2020 return even if you have no income to report ... using the stimulus credit to get the first 2 payments then the filing of the 2020 return will release the third stimulus payment.
Use one of the IRS FREE FILE options to file a zero income return :
https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free
