Late Filing of Income Tax for NRI ?

Hello,

I am working in Qatar since March 2011, and have not been filing my IT Returns. Before coming to Qatar, we have been filing our IT returns.

What are the options available for me, and for my wife to file our IT returns?

1. Can it be done online?
2. If NO, can we file our IT returns at any Income Tax office across INDIA?
3. Where can we get Form-16 from?
4. What other documents would be needed?

Kindly suggest.

Thanks,
Jimmy