“And btw, where was 3 year old Maya? Did the Dunhams also claim her as a dependent?”
Not enough facts are known to determine that but it is consistent with either:
1. Maya, a dual US/Indonesian citizen being claimed by Dunhams due to residing with them and being their dependent while Ann was pursuing her Ph.D. Maya (and Barry) could only be claimed as a dependent on one return.
2. Maya being left back in Indonsesia with the in-laws.
Again, as with Barry, NOT having Maya on the tax return does NOT mean certain loss of custody or nationality for either Maya and/or Barry.