I just signed up for the free trial and accidentally said yes to GST. I have tried purging etc but it wont work. Help please!!

Hi,  

One available option is you can select Amounts are - Out of scope of GST for each transaction.

@jaslmn-bigpond-n 

If you are using QBO Simple Start, consider opening a new blank QBO account instead.

https://quickbooks.grsm.io/Australia