28 April 2014
143(1) means it is not a notice it intimation about how CPC proses your return of income and calculated your income tax payment liability or determined refund etc... so compare this with the return of income filed by you, if all are matched as you filled and arrived tax liability or refund then you need not to take any further action otherwise means if you feel the CPC has gone wrong proses of your return of income then only you required to take action against that based on the nature of mistake by filing 154(1) rectification return.