I am assuming that you are a US Citizen/Green Card Holder. You can file married filing jointly, but then you would declare your income as well as his income. In order to file jointly, he will need to get an Individual Taxpayer Identification Number (ITIN). You would file a Form W7 and its supporting documents to get him this number. This return will be paper filed the year you apply for his ITIN. You maybe able to apply for this through the local US Embassy. The application goes with the tax return. Here are the Instructions for Form W7.
