qbteachmt
Level 15

I sure like to refer to IRS resources, since they have most of the control over these things:

https://www.eitc.irs.gov/other-refundable-credits-toolkit/what-you-need-to-know-about-ctc-and-actc/w...

And there are other links right there, for when you want to know more about, well, more stuff.

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