Renting out my first home which I received the home owners grant QLD?

It is 6 months within the first 12 months - so you can only not live in it for 6 months from the first year you purchased. You need to prove that you lived there - like electoral role change, electricity bills etc. They do check and if you "cheat" it may take 3-4 year for them to fine you but they will do it.