I am using TurboTax Deluxe on Mac and have discovered that the calculation of MAGI as used on Form 8839, line 23 is incorrect. TurboTax is populating MAGI as used on Form 8839, line 7 (which, in many cases, is simply AGI from Form 1040). Form 8839, line 23 clearly states that the filer should use the MAGI worksheet in the Form 8839 instructions, which results in a different MAGI than on line 7. This distinction matters because MAGI for Form 8839, line 23 is used solely for the purposes of determining the taxability of employer-provided adoption benefits.
