Answer:
Answer is explained below.
Step-by-step explanation:
Part A.
As per Topic 607 of IRS, if MAGI amount is below $203,540 for 2017, your credit or exclusion won't be affected by the MAGI phaseout , whereas if your MAGI amount for 2017 is $243,540 or more, your credit or exclusion will be zero. Couple have AGI of $ 150,000. The maximum amount (dollar limit) for credit in 2017 is $ 13570 per child.
Since the couple have incurred more expenses than the limit, credit would be limited to $ 13570 only
Part 2
Zero, as the adoption is of foreign child and it is not successful.
Part 3
AGI $ 206540
Phaseout for 2017 $ 203540
Difference $ 3000
Deduction 3000/40000x 13570 = $ 1017.75
Maximum Credit $ 13570 - $ 1017.75 = $ 12552.25