Kudos to those who had a 2019 return that was worse from a stimulus perspective than 2018 and held off filing as long as possible, there is no clawback function for this stimulus.
Even though I filed in Feb 2020 for 2019, IRS did not use my 2019 return (which was better for stimulus than 2018 return) so I have to wait until filing in early 2021 for 2020 to get any difference I am owed. I don’t know if the expected second stimulus would be any better (in using the 2019 return). Such nonsense.