It returns filing for ay2009-10

You cannot file now for A.Y 2009-2010. 

the last date is gone which was march 31st 2010.

Last date for Filing the Return u/s 139 which is not belated return is 31 July 2009 / 30 Sept 2009.

Your case must be of 31 July 2009. (Assumed)

Last date to file belated return is 31 March 2011.

Now you can file the return for A.Y. 2009-2010 only u/s 142(1) and not u/s 139(1) or 139(4) or 139(5)

Hence select the section code 142(1) and file your return online.

Even though you have not received notice u/s 142, you can file return u/s 142 to be on a safe side.

WARNING: But be careful after selection of 142(1) as section code may result in your case be selected for scrutiny u/s 148/143. This is just for your information.