I have 4 kids i received 66oo in advance payments and told i was overpaid for the child tax credit i was understanding i get 3ooo each for 2 and 3600 for other 2

[ZoltanB45]

Based on 2 children being between the ages of 6 and 17 and 2 children under 6, $6600 would be half of the credit. I am assuming all of your children were 17 or younger on December 31 and you are still claiming them.

A potential reason for this might be that your income increased between the years of 2020 and 2021. Single filers with a modified AGI above $75,000 and married joint filers with modified AGI of $150,000 begins sees their credit phase out. 

[ZoltanB45]

Based on 2 children being between the ages of 6 and 17 and 2 children under 6, $6600 would be half of the credit. I am assuming all of your children were 17 or younger on December 31 and you are still claiming them.

A potential reason for this might be that your income increased between the years of 2020 and 2021. Single filers with a modified AGI above $75,000 and married joint filers with modified AGI of $150,000 begins to see their credit phase out.