Form “Kor Tor 20 Kor” which appears on the same paper under Form Kor Tor 26 Kor of the year 2012, is for the company to fill out the total figure of 2011 payroll (but for each employee, the maximum annual salary for workmen’s compensation fund calculation purpose is not more than Baht 240,000 only).This form is to be compared with the amount you paid in Form “Kor Tor 26 Kor” of the previous year and make you pay the difference within the end of February (in case you paid too little in 2011) or give you the refund (if you paid too much in 2011).