on which amount TDS to be deducted at full rate

If we take a Non deduction of Tax certificate at a projected amount of interest income Say 1 crore to be receved as interest if at the year end the amount of interest is more than that say 1.25 crores so can we instrcuct the party not to deduct tax  on the entire amount or the TDS is to be deducted on the excess amount of Rs. 25 lacs.

Please advise with reference to Section/Rule/Case law if any.