If u already have ur admission no which u already paid using cbe birr(300 ETB for registration) go to addis ababa university's website and after that go to the portal then u have to check ur admission if u passed all the requirements they will give u ur id no and password which ur going to change then after that go to course registration select ur Calander year and register gn kezehi hulu befit be cbe birr registration fee meikfel albeh i think bezi bach 3800 ETB meseleg for first semester Your welcome 😉