it is confusing how this all works, but in the end, it is all based on your 2020 tax return (filing status, dependents under 17 and your income) LESS what you already received. Your 2019 (or 2018) income, filing status or the age of your children in that year simply do not matter; it is all about 2020
assuming you income is less than $150,000, you are only entitled to
1) 1200+1200 (the younger child is older than 16 in 2020 and not eligible)
2) $600 + $600 (the younger child is older than 16 in 2020 and not eligible)
LESS what you already received.
so if you already received $3600, you are not eligible for anymore
