[rukittenme]

The poor don't have taxable income. You can only claim the credit if you itemize which is restricted to even higher tax brackets.

[maxerickson]

No need to itemize, it is reported on line 54 and offsets line 44:

https://www.irs.gov/pub/irs-pdf/f1040.pdf

But lots of people don't end up paying $7500 in income taxes.