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 $13,360 over all the years that you paid expenses. If your AGI, as modified above, is $185,210 or less, you qualify for the entire dollar amount of the credit and/or exclusion.
The file is in Adobe Portable Document Format (.pdf), and you will need the free Acrobat Reader to view and print the files.
Form 8839, Qualified Adoption Expenses
Federal Income Tax Obligations