it depends on your ftba eligibility. it will show on your online services. it defaults to being paid over 13 fortnights, but you can pay it in larger installments (like i'm doing) to get it done sooner
you can also have more than one advance going - so if you took an advance of $300 now, and in two months you needed more, you could take more (subject to your limit of course) - you'd end up paying two advances alongside each other while they overlap.