Maybe put $0 in for PPS.

For FTB, you will need to put in how much you have already earnt for this Financial year.

PPS is income support and taxable. It is affected by Mat leave or part time income for example. It can also be affect by other forms of income.

FTB going off your entire income for the whole year, so you must estimate if you don't know. So this fin year you will give them the figure (already earnt) for this year, and next year, if you won't be working for the entire year, you give a figure of $0.