The IELTS Academic test is suitable for those wanting to study at a university in an English-speaking environment. It can also be used for professional registration purposes (eg. doctors and lawyers).
The IELTS General Training test is suitable for those applying to study below degree level. This includes TAFE, the VET sector, and English schools or colleges. It can also be taken for work experience or other employment training
Check with your institution on which test they require for your application.