Those adoption expenses cannot be filed yet, that is not allowed per IRS rules, unfortunately. You must wait until they become tax deductible.
For an U.S. adoption -
you can claim the adoption expenses and the adoption credit before finalization (or for a failed adoption) but you
must wait one year after you incurred the expenses (so in your case, you had
expenses in 2016 for adoption that has not finalized in 2017- you must wait to
claim them on 2017 tax return).
For a foreign adoption - qualified
adoption expenses paid before and during the year are allowable as a credit for
the year when it becomes final -
so again on your 2017 tax return.
Please
select Adoption Credit and
Adoption Assistance Programs link for details.
