income tax

sir my client get suirnty for the FY 2015-16, time bar is 31 St December, 2018, department asked addition of fixed assets, for the year, we have submitted all paid Rd.6400000/- through cheque payment, my client constructed a hospital building , department issue a notice that produce construction from which u have started, we have started FY 2013-14, end 2014-15, in 2014-15 we paid Rs.3000000/-cash payment to labour payment etc and we have vochers, the department will disallowed the cash payment