Need assistance in tax filing

Hi,

I was working in a organization for the period Apr 2011 - Dec 2011. I submitted all my actual investment proofs by Dec 2011 and the IT used to take from us during Jan 2012 - Mar 2012.

But I releaved from the organization by Dec 2011 and joined new organization. In the new organization I failed to furnish the previous organization Income since I was waiting for the Last few month salary slips for old organization.

I will get form 16 from old organization with income until Dec 2011 with some tax due. But new organization will give me form 16 with out any tax.

How can I overcome this situation, pay my tax due and also get clearance from IT dept?

Please help me out !  Thanks in Advance !