If you or your daughter can claim the credit on $2,500 of expenses (to produce a $2,125 American Opportunity tax credit), you must then reduce your qualified 529 expenses from $6,500 to $4,000. You multiply the $1,000 in earnings from your 1099-Q by the qualified percentage ($4,000 divided by $5,500 in total distributions = 72.73%) which produces tax-free earnings of $727, leaving taxable earnings of $273. The $273 is reported on your daughter's return if the 1099-Q went to her social security number. I suspect she is in a very low tax bracket, if not zero. There is no 10% penalty tax on the $273, because the penalty is waived when the income is the result of the credit adjustment.
Joe