I arrived in Thailand on 4/21/2018 and today is 3/26/2019. I have been overseas for more than 330 days, but TurboTax seems to not be letting me file because they want a full year. How should I proceed?
I suggest you file an extension, and then file your return on April 22. If you do file an extension make sure you pay any tax due on or before April 15. The extension is only for the return itself.