Yes, you can.  As long as you have an internet that allows you to file online, and you have your spouse's SSN or ITIN, you can do so anywhere in the world.  Please note that if you have a tax refund, that refund can only be directly deposited into a US bank located in the US.  Otherwise, the refund can only be mailed to you as a check to the address ( including foreign address) entered on your tax return.