OMG, I'm not sure why you think its ok to be so abrubt, but I think my question is clear.

In 2020 MFJ, 2 dependent children

In 2021 MFJ, 1 dependent child, the other no longer qualifies for 2021.

When the stimulus was issued there were 4 qualifying dependents, but the 2021 worksheet does not show for that because the 4th aged off the parents' return during 2021.

I'm looking for the best solution to not negatively impact the parents or the aged-off child. 

The worksheet does not take into account that a dependent may have aged-out during 2021.

So I am looking for a way to report this so that both the child and the parents aren't penalized for this.