2021 Lookback rule

I have seen quite a few posts about this already previously.

 

But here is my situation:

2019: I have no dependents and employed

2020: My son was born and claimed him as my dependent; Also been working until the pandemic hit and I got laid off in March. I have been receiving unemployment until it was ended mid 2021. 

2021: My 2nd son was born and will also claim him as another dependent for this year. 

 

Upon filing online, under the EIC credit page, at first it says I do not get any. But then under the review page, I came across that part where it states "Do you want to use last year's/2019 earned income?" 

So, I compared and 2020 shows around $400, then 2019 shows around $2k. 

I clicked 2019 and it updated the final amount on my expected return. 

 

I am confused now as I do not want to get this and then will owe later. Can any of the experts on here advise?

Thank you in advance.