IAB Computerised Payroll Levels 1 & 2 Combined (QCF) Course This distance learning course in Computerised Payroll combines levels 1 & 2 into a complete, home learning course accredited by the IAB & recognised on the Qualifications Credit Framework (QCF) (QCF numbers: 601/0733/9 & 601/0475/2). The IAB Computerised Payroll Levels 1 & 2 course covers 4 units of theoretical & practical information on the essential elements of computerised payroll, including the fundamental administration, theory & skills. After successfully completing this IAB Computerised Payroll course you could apply to the IAB for membership & to use the letters 'AIAB' after your name.