I migrated from Sri Lanka and started my first tax job recently in Adelaide. I noticed in my pay-slips that i have been deducted very high tax payments. When i inquired about it to the payroll team they sent me and asked me to fill the TFN declaration form. I was not aware of it initially neither did anyone mention about it or asked me to do it before start working. They only asked for my TFN number which i provided. However I did fill all my details including my TFN number in my employee detail as requested before starting work.
what am I suppose to do in this kind of situation?