Stamp Duty / Land Tax – Office of State Revenue details
Both of the above are administered on a state by state basis. The links below provides direct access to each state based Office of State Revenue website.
WA https://www.finance.wa.gov.au/cms/State_Revenue.aspx
NSW http://www.osr.nsw.gov.au
QLD https://www.treasury.qld.gov.au/taxes-royalties-grants/index.php
SA https://www.revenuesa.sa.gov.au/
VIC http://www.sro.vic.gov.au/
TAS http://www.sro.tas.gov.au/
NT http://www.treasury.nt.gov.au/TaxesRoyaltiesAndGrants/Pages/default.aspx
ACT https://www.revenue.act.gov.au/duties-and-taxes/land-tax