Query regarding TDS under Cash System of Accounting

Let me ask the question through a example

suppose, I am providing some service & Maintain the accounts on cash basis

now, I gave a service in F.Y.2009-10 (A.Y.2010-11) % raise the bill in the same year.

now Subscriber deduct my TDS & deposit the same in F.Y. 2009-10 (& give me the TDS Certificate for A.Y. 2010-11)

payment is made by him in the F.Y.2010-11 (A.Y.2011-12) due th cash basis such receipt is surendered in the income of the F.Y.2010-11 (A.Y.2011-12)

now in which Year I should demand the credit of TDS Certificate.