I have paid a self asst tax 8600 for the AY 2012-13 but the intimation U/s 143 (1) shows the tax as zero.In form 26AS my tax has been credited in AY 2013-14. In my tax challan i have filled correctly as 2012-13 when i approached the bank they said that they cannont do anything know. what to do for the Self Asst tax?