Why is turbo tax using AGI of 2020 for EIC and not 2019 earned income?

Yes you can use 2019 earned income instead of 2020 income to compute the child tax credit.

To do this in TurboTax:

• In Search, type earned income credit,
• Click Jump to earned income credit,
• Answer the questions until you reach Do you want to use last year’s earned income?
• Click Yes and enter your 2019 Earned Income.

If your earned income was higher in 2019 than in 2020, you may get a higher EITC credit by using 2019 earned income. Try it both ways in TurboTax and see what works best for you.

For more information see Earned Income Credit.