My son had no earned income in 2021. He has 2 children. He did have income in 2019. Can the lookback provision be used to get the eitc for 2021?

The Earned Income Tax Credit (EITC) lookback rule lets taxpayers with lower earned incomes use either their 2019 or 2021 income to calculate the EITC - whichever one leads to a better refund for the taxpayer.

That is the "book answer" as far as i can tell.  I cannot find a yes or no answer.  Even at the IRS.  All I can find is the above answer and eitc requirements.   If I follow the book answer it is yes.  I follow eitc it is no.  Any idia?

If TurboTax won't let you do it, you can

A) assume TurboTax is correct, OR

B) contact TurboTax Support for usage assistance, OR

C) try some other tax software and see if it works there.