So why do you increment tax_no twice?Code://accesses get_offer function to calculate new price wages[tax_no].YIT = calc_YIT( wages[tax_no].emp_income); tax_no++; wages[tax_no].YTH = calc_YTH( wages[tax_no].emp_income, wages[tax_no].YIT, wages[tax_no].taxcred); tax_no++;