The dollar limits for both the exclusion of employer-paid adoption expenses and the tax credit apply "per adoption effort." Therefore, if your adoption spans two or more years, you can only claim total credits of up to $12,970 over all the years that you paid expenses. If your AGI, as modified above, is $194,580 or less, you qualify for the entire dollar amount of the credit and/or exclusion.
The files are in Adobe Portable Document Format (.pdf), and you will need the free Acrobat Reader to view and print the files.
Download:
Form 8839, Qualified Adoption Expenses
Instructions for Form 8839, Qualified Adoption Expenses