AAT level 4 is the foremost level of the AAT qualification. Once you have achieved level 4, you will have added AAT Accounting Technician qualification. Like most qualifications, level 4 is considered a lot tougher than the former levels. Completing the level 4 qualification will provide you with the understanding and confidence you need to progress onto further education like CIMA, ACCA and ICAEW. https://speakerdeck.com/ned