This year they allow you to choose which Year's income to use for calculating different credits, you can choose either 2019 income or 2020 income.
Being that I earned more income in 2019, so for the EIC, I prefer to use 2020 income.
But for the child tax credits, using 2019 income would be more beneficial.
I'm using turbotax, and they ask the question of which year's income to use by each credit separately, so I can choose different answers for different credits.
Is that allowed?
ETA:
Called the IRS, (surprisingly, someone answered right away), and they said I can do it.