https://pickleballbrackets.com is used by Pickleball Australia (and in turn, Queensland) for sanctioned tournaments. Hervey Bay Pickleball also uses it for Thursday night league. You need to register a free account on Pickleball Brackets in order to enter tournaments or join the league.
How to Register for Pickleball Brackets
1. Go to https://pickleballbrackets.com
2. Click on the blue Sign Up button on the top right of the screen
3. Enter your email address and click on Get Started
4. Complete the form and click Get Started
5. Check your email for account verification
6. Click on the blue button to verify your email address
7. Click on the Continue button to be directed to the page for completing your account setup
8. Account has been created