Itr outstanding demand u/s 1431

Dear Sir,

a tax payer pay their tax raise on itr computation Rs.5780.00 through challan. it also reflect in 26AS AY  2016-17. of that year. But CPC issue demand notice for above amount, Once i submitted Disagree with demand but still reflecting on Demand outstanding.

sir please tell me the process to remove outstanding demand ?

thanks & Regards

Ankit