Hello, thank you for your response.
I gathered from responses like this and elsewhere that if my spouse is not electing to be treated as a resident alien, it's possible to file as "Head of Household" even if we were married and living in the same house abroad together, IF I was claiming my children (who are US citizens) as dependents, living with them and providing for more than half of the income.
So for past instances, it seems like it was okay. But now I'm gather than since I am no longer in the same household as the dependents I would be claiming (even though I am effectively sending money to them overseas to support them), I will have to file as "Married Filing Separately". I don't mind doing this, I just want to make sure I'm understanding it correctly.
@KrisD15
