Claiming refund of tds

You have to file for rectification if certain TDS is not taken. If any TDS is not seen in the 26AS one should tell the Deductor to rectify his TDS return. 

It is reflected in 26 AS. but the dept has not given the whole amount. a copy of 143(1) has been requested for to know why there is a difference. My question is whether we can demand refund again after receiving 143(1)? or is there a time limit?

Yes you can apply for rectification. Unless  143(1) comes you will not be able to understan what IT dept has missed out. You can rectify upto certain time limit from  date of receiving 143(1) . but there could be a catch the 143(1) must have been dated 2010 - just check. 

I have also not recived 143(1) for AY 2009-10. but after getting a copy of 143(1) i found that the date was oct 2010. I filed for rectification in aug 2015. It is pertaining to TDS not rectified  at the time of assesment.

Okay. Thank you. That was useful.

Main Issue is of Advance Tax paid online in FY 2007-08. The payment goes to Mumbai Nodal branch and though Ad Tax is seen on NSDL website and in 26AS -it will  be seen on IT inspector's screen as suspense account. Some IT inspectors dont know how to migrate the Adv tax from Mumbai to  the person's account thro OLTAS.  

In my case for AY 2008-09 the adv tax of 25k was paid on 7/12/2007  but till 12th dec 2015 it was showing as suspense in IT inspector's system even though it was showing in 26AS and NSDL challan inquiry status.