My daughter has had to repeat, she is doing year 11 atar and turns 18 at the end of the year. I don't know whether to get cs extended to cover the final year of high school or not. Who has done this, is it easy? The other question is, I earn a low income while ex has a high income which makes our children unable to claim austudy. If I don't extend cs when my children turn 18, will they be able to claim austudy if we prove Dad does not support them financially? He only does it now because he has to. Child has a part time job but it is only a few hours a week, we live rural so flexible employment is hard to come by.