How do I change currency to UK pounds not Australian dollars

Hello dwayneedwards01-

Thanks for posting in the Community! Let me provide some information about multicurrency.

When you sign up and create your QuickBooks Online, it automatically sets your home currency. If you've turned on the multi-currency feature, you're unable to change your home currency.

You can assign currencies to your customers, suppliers, and accounts in the chart of accounts.

If you need to, you can change your home currency.

1. Go to Settings ⚙, then select Account and settings.
2. Select Advanced.
3. In the Currency section, select Edit ✎.
4. From the Home Currency ▼ dropdown, select your currency.
5. Select Save.

If you're unable to edit your  home currency, it means you've enabled the multi-currency feature. 

For additional insights about and Multicurrency, check these articles:

• About Multicurrency
• Learn about Multicurrency in QuickBooks Online

Feel free to post if you have additional questions about QuickBooks Online. The Community is here to help you. Have a nice day!

@dwayneedwards01- 

If your company is located in UK, you should open a new blank QBO UK account 

https://quickbooks.grsm.io/UK