URGENT: Big mistake in filing tax returns

vivek (shiv sainik) (33 Points)

16 May 2010  
Hi,
I made a mistake in mentioning the assessment year while filing the returns. How can I rectify? what is the procedure?
 
The financial year when the income was earned is Apr2007 to Mar2008. When filing the IT returns, I downloaded the ITR preparation excel sheet of AY 2007-2008.  So, for AY 2008-2009, I filed the IT returns under AY 2007-2008. I submitted the ITR-1 online and submitted the ITR-V at the IT office.
 
Pleas advice.

Thanks
vivek.