Interest payble showing in itr v

Dear Expert's yesterday I have submit a ITR of A.Y. 2012-13 one of my relatives which has income from sewing bussiness.His income is not exceed of basic examption limit.But I got ITR V it is showing 8780 interest & tax payble.I am not able to understand that this interest is wahy levy while income is not taxable.here i attaching ITR V & ITR form & password to open itr form & itr V is BVBPB4184m30071982.Plz tell me what should i do.