Answer:
A) the adoption credit for 2017 was $13,570 per child. This credit applies only to adoption processes finalized during that year. This case applies since the adoption process was started in 2016 but ended in 2017.
total adoption credit = $13,570 - $3,600 received in benefits from employer = $9,970
B) the phase out range in 2017 was $203,540–$243,540. Since their income was $222,000, their adoption credit will phase out proportionally by = ($222,000 - $203,540) x ($13,570 / $40,000) = $18,460 x 0.33925 = $6,263
So the adoption tax credit = $13,570 - $6,263 = $7,307