You can e-file with a Foreign Address, but there are some restrictions.
Here is a TurboTax article with more information: https://ttlc.intuit.com/replies/3301481
Regarding the state and zip, TurboTax asks for this information because the IRS requires it and rejects e-filed forms if the fields are blank. You can try using 99999 as the zip but you will have to enter something for state. It can be a province or the equivalent of a state. If these do not work then you must paper file your return.
Here is how to jump to the section where you can enter the state:
- Sign in to TurboTax and open or continue your return.
- Select My Info from the left menu.
- On the Personal info summary page, select Edit next to Taxpayer.
- Go to 2. Tell us the state(s) you lived in and select Foreign or U.S Possession from the drop down list (it's all the way at the bottom).
- Select the Continue button at the bottom.
- Select Edit next to Mailing Address and choose Foreign country from Type of mailing address drop down list.
- Input your address in the appropriate fields, select your country from the drop down list, and select Continue.
