@Notaboy - the EITC is correct as posted on your tax return.
In your case the EITC look up is based on the higher of 2019 or 2021 Earned income. Since the 2019 earned income is higher ($16441) the table yields $6728 while using $10136 as the Earned income yields EITC of $4556. Since 2019 earned income is higher than 2021 earned income and it yields a higher EITC, you can use that. So we use $6728.
But if you look at the worksheets that are used to determine EITC, you are to look up EITC based on the Earned Income (which you did: $6728 ) and compare that to the EITC when using AGI..... if you look up the EITC for an AGI of $21,698 it is $6274.
The lower of those two EITC figures is the benefit, which in this case is the $6274. That is correct.
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
look at the table beginning on page 47 - use the HOH column (the left set of columns) with 3 children.
