you probably do nothing..... TT is correct.
EIC is quite complex and the way it works in 2020 if using your 2019 income gives you more EIC than your 2020 income, then you are permitted to use 2019.
But it is not as simple as it sounds. In general, starting from zero income, the more you make the more EIC you get, then as some point, the more you make doesn't really change the EIC number so EIC plateaus, then the more you make the less EIC you receive.
So did you income put you on the upward slope, the plateau or the downward slope? that impact how this works. I suspect since you state your 2019 income was 'way more', in 2019, your EIC was based on the 'downward slope' (meaning for every dollar of income you made, your EIC went down), and if your 2020 income was lower, 2020 probably got you more EIC
Trust that as long as you entered the 2019 income number, TT figured it out correctly. If there was a bug, these board would "blow up".
