Work from Home & ABN?

[~Gee_Whizzy~]

I'm going to be doing admin based work from home but need to register for an ABN and not really sure what i need to do?. i had a look at the vic gov website and it just confused me even more! - I haven't commenced the work yet but the online agency im working through requires all employees to have an ABN prior to work being offered to us.

Can anyone help please? do i need to apply for the gst, tax credits etc?

TIA