Tax credit for adoption from foster care?

If the child you adopt from foster care in the USA is designated a "special needs" child by the IRS definition, then the parent qualifies to claim the entire adoption tax credit nop matter how much money was spent on the adoption. So on the 8839 form, you mark a checkbox that says the child qualifies as special needs according to the IRS, then fill in the whole amount of the tax credit where it asks you how much you spent.