Wrong order u/s 143(1) Ay 2019-20

A taxpayer received a wrong assessment order under section 143(1) concerning capital gains calculation. Their rectification request was denied because a change in the ITR utility led to a discrepancy in carried forward losses. The advice given is to file a revised ITR under section 139(5) of the IT Act, which is permissible even after an assessment order if it's an intimation under section 143(1).