Australian Taxation Office – tax obligations, including income tax, capital gains tax (CGT) and goods and services tax when dealing in property or land
https://www.ato.gov.au/general/property/

Queensland Treasury Budget and Finaacial Management
https://www.treasury.qld.gov.au/budget-and-financial-management/revenue-and-taxation/

Queensland State Government Advices for Buying a Home
https://www.qld.gov.au/law/housing-and-neighbours/buying-and-selling-a-property/buying-a-home

Queensland First Home Owners’ Grant – eligibility and obligation check
https://www.qld.gov.au/housing/buying-owning-home/financial-help-concessions/qld-first-home-grant

Land Tax 
https://www.qld.gov.au/environment/land/tax