Many people are facing same kind of issue.. In recent time almost every client of mine has got default notices from TDS CPC for no reason... Now, The only way with you is to contact the local jurisdiction officer administering the TDS section. Either he will nullify the said notice or will suggest you the way to do same... In few cases, we have represented letters to TDS CPC with necessary documents available with us and got notices cancelled but replies are still pending from them for few more cases..