Rectification of itr 1

There was a letter in 143 1 from IT dept for tax demand whereas the tax was paid but put in "tax payable" column in place of "Tax paid" column in ITR -1 for assessment year 2012-13.

we have filled rectification now as we have time u/s 139(5) considering the letter 143 (1) was not based on result of assessment completion but due to wrong line entry while filling. The tax was already paid one year back and no actual due.

kindly advice on this.