ADDENDUM:
If my posting above described your situation; i.e., if you started an amended return by mistake, then here's some more info you may need.
Once you cancel the amendment and have restored and reviewed your original return, whether or not you can efile from a foreign country will depend on the following factors:
FAQ: Can I efile with a foreign address?
https://ttlc.intuit.com/turbotax-support/en-us/help-article/electronic-filing/e-file-foreign-address...
