If you are both non-resident aliens, then no, you cannot file a joint return. In order to file a joint return, one of you would have to a resident alien, then the other would have to choose to be treated as a resident alien.
If you are both nonresident aliens, you would need to file a form 1040NR which TurboTax does not support but our partner Sprintax does and can help with your non resident return.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"